does it have selectable channel

No it comes with a default channel already and you can't change the channel.

What the frequency that the microfone Works at. i Will use in Brazil

The mic frequency will automatically adjust itself. No need to look for the right frequency.

I need to buy 5. Can they all be different frequencies?

I believe so. I have 2 operating without problem at the same location. I do not recall a frequency adjustment so it must be automatic. There may be an upper count limit. Ask the manufacturer.

Can three single wms40 mini vocal set be operate at the same time without conflicts frequency or channel?

As long as they are all different ABCD bands of this model. I have three for my wedding DJ setup and I run ABC bands with absolutely no interference. Have been doing this for about 3 years now. No dropouts up to about 100 feet line of sight and no failures yet. I even have to AKG's from 20 years ago I use as well if needed for lavalier applications that still work perfectly. Big AKG fan here.

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AKG Pro Audio WMS40MINI Vocal Set Band US25C Wireless Microphone System, with SR40 Receiver and PT40 Mini Pocket Transmitter

AKG Pro Audio WMS40MINI Vocal Set Band US25C Wireless Microphone System, with SR40 Receiver and PT40 Mini Pocket Transmitter

Product ID: 415030505

Details

Brand
AKG
Connectivity technology
Wireless
Connector type
6.35 mm Jack
Model name
WMS40MINI Set
Recommended uses for product

🎤Dynamic cardioid capsule

📡Reliable wireless range

🔋30-hour battery life

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61702 som

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Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎤 Own the stage, wire-free and worry-free!

COMPACT PORTABLE - Ultra-compact SR40 receiver fits anywhere, perfect for on-the-go pros.
CRYSTAL CLEAR SOUND - Dynamic cardioid capsule ensures maximum gain before feedback for pristine vocals.
MARATHON BATTERY LIFE - 30 hours of uninterrupted performance on a single AA battery—stay powered all day.
EFFORTLESS PLUG PLAY - Get on stage instantly with ultra-simple setup—no tech headaches.
UNIVERSAL COMPATIBILITY - Works seamlessly with amplifiers, karaoke machines, radios, and speakers—your all-in-one wireless solution.

The AKG Pro Audio WMS40MINI Vocal Set is a professional-grade wireless microphone system featuring a dynamic cardioid handheld transmitter and an ultra-compact receiver. Designed for crystal-clear sound and up to 30 hours of battery life on a single AA battery, it offers reliable wireless performance with universal compatibility across amplifiers, karaoke machines, and speakers. Ideal for managers and creatives who demand hassle-free, high-quality audio on the go.

Specifications

ASIN	B01IHISZ80
Antenna Location	Indoor/Outdoor
Audible Noise	85 Decibels
Brand	AKG
Built-In Media	Battery
Color	Black
Compatible Devices	Amplifier, Karaoke Machine, Radio, Speaker
Connectivity Technology	Wireless
Connector Type	6.35 mm Jack
Customer Reviews	3.9 3.9 out of 5 stars (205)
Enclosure Material	Crystal
Frequency Range	20 hz 20 khz
Frequency Response	20 KHz
Global Trade Identification Number	00885038038993
Hardware Platform	Karaoke Machine
Impedance	600 Ohms
Item Dimensions	28.7 x 23.8 x 5.9 centimeters
Item Type Name	Wireless Microphone System
Manufacturer	AKG
Mfr Part Number	3347X00130
Microphone Form Factor	Handheld
Model Name	WMS40MINI Vocal Set BD US25C
Model Number	3347X00130
Number of Batteries	1 AA batteries required. (included)
Number of Channels	1
Polar Pattern	Unidirectional
Power Source	Battery Powered
Signal-to-Noise Ratio	85 dB
Special Feature	Wireless
UPC	885038038993 750408396488
Unit Count	1 Count

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