---
product_id: 599552438
title: "X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts | Wireless Long Range Mailbox Sensor with SBS50 Base Station, Up to 4 Years of Battery Life, SMA11"
brand: "x-sense"
price: "9489 som"
currency: KGS
in_stock: true
reviews_count: 9
category: "X Sense"
url: https://www.desertcart.kg/products/599552438-x-sense-smart-mailbox-alarm-for-delivered-mail-app-alerts
store_origin: KG
region: Kyrgyzstan
---

# 50m long-range wireless 4-year battery life IP65 waterproof durability X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts | Wireless Long Range Mailbox Sensor with SBS50 Base Station, Up to 4 Years of Battery Life, SMA11

**Brand:** x-sense
**Price:** 9489 som
**Availability:** ✅ In Stock

## Summary

> 📬 Stay ahead of the mail game—never miss a delivery or theft again!

## Quick Answers

- **What is this?** X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts | Wireless Long Range Mailbox Sensor with SBS50 Base Station, Up to 4 Years of Battery Life, SMA11 by x-sense
- **How much does it cost?** 9489 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/599552438-x-sense-smart-mailbox-alarm-for-delivered-mail-app-alerts)

## Best For

- x-sense enthusiasts

## Why This Product

- Trusted x-sense brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ultra-Long Battery Life:** Replaceable lithium battery lasts up to 4 years on typical daily use—install once, forget for years.
- • **Weatherproof & UV-Resistant:** Built to withstand rain, snow, and sun with IP65 rating and ASA shell for lasting outdoor performance.
- • **Instant Mail Alerts Anywhere:** Get real-time push notifications the moment your mail arrives—never miss a delivery again.
- • **Effortless Multi-User Sharing:** Seamlessly share access with family or roommates via the X-Sense app for collective peace of mind.
- • **Robust Long-Range Connectivity:** Reliable 2.4 GHz Wi-Fi connection with up to 50 meters range, even through dense obstacles.

## Overview

The X-Sense Smart Mailbox Alarm is a sleek, wireless sensor that connects via 2.4 GHz Wi-Fi to the X-Sense app, delivering instant alerts when your mailbox is opened. Designed for various mailbox types, it boasts a 50-meter reliable range, IP65 waterproof rating, and a 4-year battery life. With multi-user sharing and customizable alerts, it’s the ultimate smart security upgrade for your home’s first line of defense.

## Description

desertcart.com: X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts | Wireless Long Range Mailbox Sensor with SBS50 Base Station, Up to 4 Years of Battery Life, SMA11 : Tools & Home Improvement

Review: Reliable and convenient - Mailbox sensor is approximately 500’ away, with dense woods in between. Easy to install and worked immediately, the iPhone app is great. It is great to have the notifications because our rural delivery is subject to varying times and this saves me going out multiple times, will be wonderful during rain and snow periods.
Review: MAILBOX ALARM, KNOW WHEN MAILBOX DOOR IS OPENED~CATCH A THIEF - UPDATE 7/15/2026 ********** My issue with the company is you made it so difficult for him to try to prove he had a faulty product that he just decided to do what was easiest for him. I would’ve done the same thing if I had the same issues. Below is his comment. I just wanted you to know you may find a better way, like maybe replace it rather than work with a faulty item. Mine worked fine but there’s 300 people I recommended this to That,. I hope it works like it did for me. BELOW IS WHAT MY HOA MEMBER had difficulty with this mailbox alarm….. “I'm having a really difficult time getting my X-Sense mailbox system to install. I've contacted X-Sense for technical help. The app won't let me scan the QR code on the base station and when I enter the serial number it goes nowhere. 20 minutes ago I intered the S/N and the phone is still on the entry screen. Frustrating.” “I contacted technical help via their web site” “I got a reply from X Sense with some instructions. I followed them and was still unsuccessful. The last instruction was, "If the issue still cannot be resolved, please send us a short video showing the setup process and where the app gets stuck or goes back." I'm not going to do that. I'm going to return the system and go with a different one.” “I got a reply from X Sense with some instructions. I followed them and was still unsuccessful. The last instruction was, "If the issue still cannot be resolved, please send us a short video showing the setup process and where the app gets stuck or goes back." I'm not going to do that. I'm going to return the system and go with a different one.” ********************* January 20, 2026 One of the best purchases I ever made was this mailbox alarm. That only does it alert you when the mail door is open and they’re putting mail in, it will tell you if someone opens it after the mails come and steals it. The alarm goes off on your smart phone if you’re away from the house. If you’re in the house, there are several Sounds. You can use to let you know the mail has come. It also has a blue X if there has been no mail. And there’s a red X if the mailbox door has been opened. Your smartphone also keeps a history of when the mailbox door has been opened. If you live in a rural area & worry about male theft. This is exactly what you need. Don’t forget to put up a camera that will also get a picture of when the door has been opened. I have recommended this to many neighbors in my community. It’s the best thing for your money, it’s long range and the battery lasts for a very long time. 1/20/2026

## Features

- Note: Compatible only with 2.4 GHz Wi-Fi (incompatible with 5.0 GHz); connects to the X-Sense Home Security App via the included base station
- Real-Time Push Alerts & Multi-User Sharing: The moment your mail arrives, you'll receive an instant app push alert; manage various features from your phone, such as device sharing, mail reminder, one-button silence, adjusting volume up to 100 dB, and ringtone selection
- Long-Distance Transmission, Accurate Detection: With extensive coverage, the smart mailbox alarm maintains a strong and reliable connection to the base station via a 2.4 GHz Wi-Fi network, and promptly sends notifications to your phone
- Compatibility with Various Mailbox Types: This mailbox alarm is designed with a sleek and compact profile; compatible with curbside/post mount, wall mount, slot type, and cluster type mailboxes; not suitable for mail slots without lids
- Extra Long Standby, Easy Setup: The replaceable battery offers a long 4-year lifespan based on 5 daily triggers; the alarm is 100% wire-free and easy to install using the double-sided tape included; following the in-app instructions, simply add it to the X-Sense app in seconds
- Built for All-Weather Durability: With its IP65 waterproof rating and an operating temperature range of 14–140°F (-10–60°C), this wireless mailbox alarm operates reliably even in extreme weather; ASA shell and silicone seal prevent fading caused by sunlight and UV rays
- Customize Your Home Safety System: Includes 1 mailbox alarm and 1 SBS50 base station; each base station can add 50 X-Sense devices, providing complete coverage for both your indoor and outdoor properties; customize your device names for easy location and management as needed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CPLQ16K7 |
| Audible Noise | 100 db |
| Battery Description | Lithium |
| Best Sellers Rank | #26,740 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #22 in Post-Mount Mailboxes |
| Brand | X-Sense |
| Built-In Media | 1 X SBS50 Base Station, 1 X User Manual, 1 X Smart Mailbox Alarm SMA51 |
| Color | Black |
| Compatible Devices | Smartphone |
| Control Method | App |
| Customer Reviews | 4.3 out of 5 stars 1,526 Reviews |
| Item Dimensions L x W x H | 3.91"L x 1.02"W x 1.06"H |
| Item Type Name | Mailbox Alarm |
| Manufacturer | X-SENSE |
| Maximum Range | 50 meters |
| Mfr Part Number | X-SENSE |
| Model Number | SMA11 |
| Mounting Type | Protruding |
| Number of Batteries | 1 CR2 batteries required. (included) |
| Number of Items | 1 |
| Power Source | Battery Powered |
| Product Dimensions | 3.91"L x 1.02"W x 1.06"H |
| Sensor Technology | Infrared Sensor |
| Size | 1 Alarm + Base Station |
| UPC | 850053675409 |
| Voltage | 3 volts |
| Wattage | 1000 milliamp_hours |

## Product Details

- **Brand:** X-Sense
- **Color:** Black
- **Compatible Devices:** Smartphone
- **Power Source:** Battery Powered
- **Product Dimensions:** 3.91"L x 1.02"W x 1.06"H

## Images

![X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts | Wireless Long Range Mailbox Sensor with SBS50 Base Station, Up to 4 Years of Battery Life, SMA11 - Image 1](https://m.media-amazon.com/images/I/61JsrJVrxqL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Reliable and convenient
*by C***Y on June 13, 2026*

Mailbox sensor is approximately 500’ away, with dense woods in between. Easy to install and worked immediately, the iPhone app is great. It is great to have the notifications because our rural delivery is subject to varying times and this saves me going out multiple times, will be wonderful during rain and snow periods.

### ⭐⭐⭐⭐⭐ MAILBOX ALARM, KNOW WHEN MAILBOX DOOR IS OPENED~CATCH A THIEF
*by S***Y on January 20, 2026*

UPDATE 7/15/2026 ********** My issue with the company is you made it so difficult for him to try to prove he had a faulty product that he just decided to do what was easiest for him. I would’ve done the same thing if I had the same issues. Below is his comment. I just wanted you to know you may find a better way, like maybe replace it rather than work with a faulty item. Mine worked fine but there’s 300 people I recommended this to That,. I hope it works like it did for me. BELOW IS WHAT MY HOA MEMBER had difficulty with this mailbox alarm….. “I'm having a really difficult time getting my X-Sense mailbox system to install. I've contacted X-Sense for technical help. The app won't let me scan the QR code on the base station and when I enter the serial number it goes nowhere. 20 minutes ago I intered the S/N and the phone is still on the entry screen. Frustrating.” “I contacted technical help via their web site” “I got a reply from X Sense with some instructions. I followed them and was still unsuccessful. The last instruction was, "If the issue still cannot be resolved, please send us a short video showing the setup process and where the app gets stuck or goes back." I'm not going to do that. I'm going to return the system and go with a different one.” “I got a reply from X Sense with some instructions. I followed them and was still unsuccessful. The last instruction was, "If the issue still cannot be resolved, please send us a short video showing the setup process and where the app gets stuck or goes back." I'm not going to do that. I'm going to return the system and go with a different one.” ********************* January 20, 2026 One of the best purchases I ever made was this mailbox alarm. That only does it alert you when the mail door is open and they’re putting mail in, it will tell you if someone opens it after the mails come and steals it. The alarm goes off on your smart phone if you’re away from the house. If you’re in the house, there are several Sounds. You can use to let you know the mail has come. It also has a blue X if there has been no mail. And there’s a red X if the mailbox door has been opened. Your smartphone also keeps a history of when the mailbox door has been opened. If you live in a rural area & worry about male theft. This is exactly what you need. Don’t forget to put up a camera that will also get a picture of when the door has been opened. I have recommended this to many neighbors in my community. It’s the best thing for your money, it’s long range and the battery lasts for a very long time. 1/20/2026

### ⭐⭐⭐⭐⭐ Better than Ring Mailbox Sensor, Working Great at 100'
*by J***W on January 11, 2025*

According to Google Maps, the sensor and base station are 100' from each other, though it's probably a little less (I did some manual measuring but did not want to run my reel tape across the street). Please see the associated picture for my setup. The base station is in my garage on large, cluttered steel shelving, and we have a metal garage door and stucco exterior. The mailbox is also metal, and although the company recommends installing the sensor on the outside of a metal mailbox, that's unreasonable if you think someone might be stealing your mail since they could just slide the sensor right off. So I installed it inside the mailbox. Part of the reason I got the sensor was neighbors complaining about their mail being stolen, but using "USPS Informed Delivery" I can see what I am expecting each day, and an alert from this sensor lets me grab the mail as soon as it arrives if I'm home. It's only been installed a few days but so far it has worked 100% of the time (as confirmed by my own testing and Ring cameras which snapshot every 30 seconds). My mailbox was here when we moved in, and it's a bit unusual. It has a swinging top portion and a locked lower portion. When the mail is delivered, the top portion opens enough that mail can come in, but not your hand, since there is a metal guard that also flips up. I installed the sensor on the lower, inside portion of the metal flap, so it does not block mail delivery (again, see photos), but that means there is always one or two layers of metal between the sensor and the outside which I was afraid would block the signal. In fact, I previously purchased a Ring mailbox sensor that never successfully alerted me to any mail. It triggered in a few tests, but was never reliable inside the box despite the huge antenna. One reason I bought the X-Sense was the separate base station, which could be closer to the mailbox than the Ring Bridge. Ring only lets you have one Bridge, and moving it to the front corner of the garage sacrificed the connection to the lights at the back of our property and still didn't detect the mail. Now the Ring Bridge is in the back of the house, and the X-Sense Base Station is in the Garage. The Ring Sensor might have theoretically been able to trigger cameras that would record who was accessing the mailbox, but since it never worked at all, it was a moot point. On sale, these units cost about the same (even with the X-Sense base station included). The X-Sense is also smaller and easier to install as well as being more effective and reliable. Contrary to another recent review, the app definitely works on Android. I am using a Pixel 6a (2.5yrs old at the time of my review) and it has no issues. Perhaps the other reviewer had a phone that was limited to an out of date Android OS. I am on Android 15. All in all, 5 stars! It even came with two adhesive pads for the backer. My only gripe is that has a two minute delay after triggering before it will trigger again, and I'd like to be able to adjust that timer, but I understand the reasoning.

## Frequently Bought Together

- X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11
- X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51
- X-Sense Smart Home Security System, Wireless Home Alarm System 8-Piece Kit, Supports Mobile App Alerts, Compatible with Alexa, Includes 1 Base Station, 4 Door Sensors, 2 Motion Sensors, 1 Keypad, AS08

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-08-28*