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.

This appears to be a well built board. It has pretty good documentation. Probably great documentation for the average person buying it. It functions as described. Easy to setup. No problems found using a 5V automotive converter. I especially like the various "programs" offered by the manufacturer. Bonus feature was a breakout for a serial connection that you can use to set all of the parameters with. I don't have a use case for that in my project but I can see where that would be extremely helpful for others.

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.

I tried several version of this same device with dismal results but this one from Drok seems to be functioning properly. I use in a golf cart to light up the keyhole when it is being driven after dark so have it set on the simplest program for 10 seconds. The attachment for the wiring is sub-par unless you are using some really small wire, like 22 gauge. My other wish list item is that you could turn the display off. Mine sits hidden inside the dash so is never seen and once programmed, the screen serves no function although even with the screen on, it only draws 15-20 milliamps which is nothing for a lithium golf cart battery. Overall satisfied IF the wiring doesn't start popping out of those pitiful connectors.