Its not sold in the US but AliExpress will send it to you for about $50. Bought one and have 3 more on the way. So these sensors are about the size of a deck of cards, and they plug into a USB power supply. They are Zigbee, and will pair with a Zigbee hub, but they are made to pair with the Aqara Hub like the M2. So once paired with the Aqara hub, the hub is claimed to pair with Amazon Alexa and Apple Homekit. I have gotten it to work with Homekit, but NOT Amazon, and I do have the Amazon Aqara Skill installed. f you pair the sensor with a Zigbee hub, you CAN'T control the settings on the sensor, like sensitivity. To control the settings you must have the Aqara Hub and the Aqara app. on your phone.
So, what is this sensor? It uses a low power microwave sensor, to detect people, as apposed to a passive IR sensor that detects motion. So it covers an area of 120degrees about 5 meters out (15 feet). It takes maybe 10 seconds to activate and maybe another 10 seconds to clear. BUT its very good and does not shut off even if you don't move. I have mine in my bedroom and its been very reliable. No untrips all night.
Aqara just announced the FP2, but it is NOT Zigbee, so not sure how it connects or the price.
If you really want to turn on and off lights when you enter of leave a room, use an IR sensor to turn on lights for speed, then use the Aqara sensor to control the turn off for reliability.
So, what is this sensor? It uses a low power microwave sensor, to detect people, as apposed to a passive IR sensor that detects motion. So it covers an area of 120degrees about 5 meters out (15 feet). It takes maybe 10 seconds to activate and maybe another 10 seconds to clear. BUT its very good and does not shut off even if you don't move. I have mine in my bedroom and its been very reliable. No untrips all night.
Aqara just announced the FP2, but it is NOT Zigbee, so not sure how it connects or the price.
If you really want to turn on and off lights when you enter of leave a room, use an IR sensor to turn on lights for speed, then use the Aqara sensor to control the turn off for reliability.