Blackt Electrotech: (BT31M1) Microwave/Radar Motion Sensor Occupancy Motion Detector Small Sq Shape 18 Months warrenty (2)

have been using these microwave sensors for about 6 months now and they are very useful and works superbly. They can be adjusted to your needs in terms of sensitivity, time delay, and range. I have 3 such sensors at home conveniently placed where not frequent movement happens.. and kids sometimes forget to switch off lights.. this is a major power saver..

Best performance,It gives good results in all matters.

I love the operation of the product. It works only when it is dark if you set the LUX sensor appropriately. It turns on immediately when I open the door. However, the timer isn't accurate. Sometimes, it switches off at the set time, and a few other times, it takes a few seconds longer. The device looks a little cheap. The company definitely need an English-speaking employee to correct their English in their manual/instruction. Overall, it's a fantastic product. I will order more of them for all my lights and recommend it to all prospective buyers.

Nice product. Recomended buy.

This is a good product. The issue I face with this is there is some flaws in motion detection , Many times even if there is no motion it blows the light. And The point is the issue is in its main functionality , It should be fixed and should be more accurate.

I have been using it as a security system. Installed it at the entry point of my house and connected a siren (230 V AC). Working well.

Performance is good. It need qualified electrician to install.

Bought the sensor on 18th July 2025 . Installed on the same day. Sensor burnt on 28th /29th early morning. Burnt smell coming . There was no voltage surge in the house as many other sensors and cameras working. Voltage never goes beyond 240 volts. Inferior quality product . Seller refused warranty saying burnt as if its my fault .18 months warranty is only valid id it misbehaves. Strange vendor . Avoid this product