I bought 2, and am glad I did!
This little switch works wonderfully! I use it as a motion detector in my home’s entry-way to turn on 2 meters of LED strip when you walk in the door after dark. It is unobtrusive and always works correctly! I saw some reviews saying that there was no way to adjust it, but I had no trouble: you simply pop off the back of the case with a small flat-head screwdriver and the three blue dials are all immediately visible and accessible.The sensitivity dial controls how close you have to be to the sensor in order to activate it, and I set mine to about the halfway point, so it wouldn’t trigger when someone walked down the hallway a few feet from the entry-way. The delay time dial controls how long the light stays on once it gets triggered, and it is super sensitive! Just a degree or two can change the amount of time by several seconds! The Light Sensor dial controls the lighting threshold. What I mean is that it sets a light level that the sensor bases its operation around: if the ambient light (the amount of light already present in the room) is below the threshold, then the sensor will allow itself to be triggered and turn the lights on when it senses motion. But if the ambient light is above the light threshold, you can’t trigger the sensor and it won’t turn on. This turned out to be an incredibly useful feature for me, because it allowed me to play around until I found a value that starts triggering the sensor around twilight/dusk.A quick tip for using the adjustment dials:When you are trying to figure out your values for the Sensitivity and Light Sensor dials, have the delay time set to its minimum value, otherwise you’ll be wasting a TON of time waiting for the lights to turn off to try new settings. Also, when you pop the back off of the sensor to get at the dials, be aware that the sensor’s circuit board is not actually screwed into place inside the housing, and so will fall out if you turn it upside down… Now, I didn’t find this to be a problem for me, but it may disconcert some people, so just be aware.Because of how useful these little sensors seemed to be (as well as how cheap they were!!!), I bought 2 of them on my first order and boy am I glad I did. Now I have set them up at both my front and back doors, and I’m even thinking about setting one up for my internal garage door! I really can’t praise this product enough! Just keep in mind that they were never meant to control an entire room full of LED lights; the maximum current on this thing is only 3 Amps, so don’t overdo it!

Good product and Value!
This motion worked out very nicely for me. I was looking for a way to light my gun safe. On YouTube I found a number of videos using LED lights to do this. One of them referenced this sensor as part of what they used along with the LED lights and power supply. I inserted the product link for them in this review so I hope they show up. It could not have been easier to do. Took me about a half hour. The results were excellent! There are three screws inside this unit to make adjustments. The information on the package is very brief and to me it was confusing. I started out by just setting them all in the middle and it was perfect! Several days after I received the item (and had installed it) I received with nice detailed instructions on the setting screws. I should have gotten it the day it shipped I suppose but it is helpful so if you are confused about anything just wait for the e-mail. If you’re doing a gun safe check out YouTube. Otherwise a big thumbs up!inShareplus 12V LED Strip Power Supply 2A 24W, Wall Mounted 12V Switching Power Supply, 110V to 12 Power Supply for LED Strip Light with 5.5/2.1 DC Female Barrel Connector to Screw AdapterLE 16.4ft LED Flexible Light Strip, 300 Units SMD 2835 LEDs, 12V DC Non-waterproof, Light Strips, LED ribbon, DIY Christmas Holiday Home Kitchen Car Bar Indoor Party Decoration (Daylight White)

Replaced an older set that died after 4 years
I used these to light up my stairways when it’s dark. it has been running for 24/7 for the past 4 years before the sensors finally died and stayed as ON the whole time. Took a bit of effort to remove the old solder and replace it but otherwise, it’s straightforward.

I like to turn off my desk light when away, but often I am up late at night or early morning when it is dark so having a sensor switch that detects me when I am wandering around is a good idea. Good safety idea to see where you are going. so on comes the desk lamp, and it is safe.

Excellent product. It came really fast too. The only bad thing is that the adjustments can’t be done without opening the case (Wich cannot be done easily)