YCA2002 Ceiling Motion Sensor, 5.8 GHz Microwave Motion Detector Light Switch, Rated 800-1200W, Ceiling Mount Motion Detector, 32-ft Range, White

This is the second sensor I boughtthe first one I use in my garage and has worked flawlessly since I installed it 4 years ago.This new one is going to my shed.Can’t wait to get it up and put it in use.

I purchased this to replace a very expensive PIR device, but a nearby AC vent would cause false trips frequently. This unit solved that issue.The only "issue" I had with this unit is that unit is sized for a 3" box, and my installation is a 4" box. This was easy to fix by mounting it on a 4" round cover first, then mounting the cover-sensor assembly.

This device difference from motion sensor which it can sense you through wave similar as sound but it work well which creepy when it light up if you was behind the wall near microwave sensor. Indeed it work very well and this technology use in many food store automatic doors. Yes it work well. Thanks.....

I was really thinking this would replace my existing motion detector in my walk-in closet and that I would get some improved performance based on the difference in technology; however, there were several things I did not like about this.1. It didn't come with instructions. I had to pull whatever install information I used from the photos attached to the Amazon listing for this product.2. This does not fit a standard round opening. It is a little smaller so I will have to fabricate an adapter using a blank ceiling fixture cover.3. Most wiring for houses is solid copper. The solid copper is not flexible enough to make it easy to run through the hole for the wires and make the bends necessary to attach to the push down connector. So basically you need to come up with stranded wire of the proper gauge to wire this since there isn't any provided with the motion detector.4. The push down connectors where hard to use and it took several attempts at trying to get the wires into the connector before I got good connections that didn't easily pull out. It would have been better to have screw down connectors instead of these push down connectors ... or to have totally skipped the connector entirely and soldered three wires of the proper gauge to the circuit board like most of the other motion detectors do.5. The adjustability doesn't quite have the range I would like. I currently have the ON Duration and Sensitivity set to the lowest settings and the light stays on longer than I would like and has been triggered on by activity several feet outside of the open closet door. The previous detector I had better adjustments that accommodated my desires.Would I buy again knowing what I know now? Probably not even though the price is very good. That is the main reason I am not returning it is the low cost makes it to where it would not be worth my time now to remove it and return it. It is a little frustrating because these are pretty much all simple things to fix, but seems to be more systemic of products made in China.

I really wanted to like this sensor. It was nice that it would detect a door opening and the lights would be on when you entered, unlike a PIR sensor that needs to see a body before it triggers. However there are multiple show stopper issues that caused me to return these.Hard to Adjust and Get Stuck ON:The main issue is that they are buggy and impossible to get adjusted correctly. After two days of trying to tune them I can not stop them from getting stuck on. They are set to the lowest time setting (8sec) but they regularly get stuck on and I find the lights on hours later. The only way to get them to reset is turning the dials to min setting and then adjusting again. I have tried so many adjustments of the setting and they will seem to work when I'm in the space and I will hear the relays flipping as I move around the space. But then I will leave the detached garage and look out minutes or hours later and the light will still be on.Major 5GHz WiFi Interference:My detached garage has a Google Nest mesh access point in it which is connected via WiFi to the main house. This point has worked flawlessly for a year and then I put these sensors in and the point will drop off the network in a few minutes of powering them on. If I can keep it up long enough to test it it goes from "Great" to "Weak" signal strength when these sensors are powered on. Nest WiFi and most other mesh WiFi systems use 5GHz band for the mesh backhaul connection. Seems like this sensor is interfering with that spectrum.Install Issues, Clearly Not Designed for US Market.As others have pointed out this has some push button spring terminals on it. There is no way these meet US electrical code and there is no UL listing on the product. Beyond that they are too small and really hard to use. You can just barely fit 14AWG stranded wire into them (this is the minimum you can use in the US and even then only for limited lighting installations). These connectors would look at home on a thermostat of other low voltage component, not on a line voltage device. Also the mounting is not for US standard 4" box, you will need to make an adapter plate of some sort.

Shipped quick, easy to install, works great. I'm not an electrician, but I can change a switch or outlet. Instructions were simple to follow. The first one worked so well in the garage, I put another one in my shop. Also added a J.LUMI PIR sensor out on the porch for the fans. Great products and company support.

Installing these in the man cave when I walk in and it brings everything up as soon as I get there

This unit performs as expected, but the designer should make changes! They send plastic anchors with screwws and the instructions suggest mouting to ceiling by pulling circuit wires through the ceiling. Any device except low voltage ones should be mouted to an outlet or fixture box! This company (Chinese) must use metric measurements as none of their devices I have used do not properly fit the standard mounting holes of our electrical boxes or plaster rings