DROK Time Delay Relay, DC 5V/12V/24V Timer Relay Delay-Off Cycle 0.01s-9999mins Adjustable Trigger with LCD Display Support Micro USB 5V Input

works fine as it should, it comes with a manual explains everything but they need to add it to the amazon description, I don't know why it does not go to sleep if it is in an infinite loop, I was hoping that I can reduce the power of the screen. I like the 4 stand pieces. I will update if anything bad happens.

The rear wiper on my jeep only has one speed for intermittent timing, about 5 seconds. Too short for water to accumulate on the glass, so it makes an annoying squeaky noise and also wears out the wiper if you leave it on. I installed this device in line with the power from the switch for the rear wiper, and set it so that it will trigger the wiper every 30 seconds. Took me a couple of hours to figure out how to install/wire/program the whole thing and then put all of the interior bits back into the jeep. The new, longer interval is much better. It works perfectly, though. The instructions are very clear and the unit itself is rather intuitive to set up and program. The device has numerous other features and programmable settings to do more complex operations than what I used it for. Seems to be a good price for what it is capable of doing. I hope that it lasts a long time! If it craps out earlier than I arbitrarily believe it should, then I will come back here and complain about it in this review.

very versatile. i use these to periodically circulate how water thru my heating system to avoid frozen pipes. a little tricky to figure o ut the programming, but great units. the display turns off after 5 minutes, but you can defeat the auto turnoff if you want to keep display on. also, the settings stay when power is off, so no worry about losing your settings. these duplicate a unit i invented, called the pipesaver about 40 years ago or more, but now with these, my design is obsolete. just add power (can power with a small usb block and cable or other sources.) and hook up to whatever you need to control. relay is 10 amps up to 250v. these can be used as a cycling timer, or time delay o or off, etc. lot of uses.

Great piece of electronics. Using as an antenna rotator control (along with two wall wart transformers), since we only need two antenna positions. Works perfectly, easy to program and wire. From an experienced electronics technician.

This is a great timer module, unbeatable at this price. I chose this one over the many others because the function display appeared best (and it is). It is easy to set; with a little practice, you can easily memorize the very logical steps to set the various modes. I have explored all the timing modes, and P7 often suits my needs perfectly. It has fast startup, and can trigger when signal and power are applied simultaneously. Both high and low inputs are active, so it is possible (as in my case) to trigger and block timing by both these channels in opposition. So far, it seems to have good noise immunity, and works correctly every time. The instructions are an imperfect translation, but they do send a spec. sheet with the timer (which they keep improving with each order). I'm still prototyping, but plan on using these to time an automatic backup generator run for my PV system. I ordered more. More details to come as I finalize the application circuit. [UPDATE] I now have 5 of these involved in my project. I'm using P1 and P7 as general time-out programs, and P6 for the auto-starter (which cycles the starter every few seconds until the generator starts, or the cycle times out). I even use one to beep a warning horn for a few seconds before the actual starter engages, so anyone nearby is aware of the pending startup. I never would have pursued such a project if I hadn't found these! DROK sells other things too, and I'm eager to check out some of their other products.