Please note:Slight color difference or difference in kind, does not affect the use, please do not mind, thank you! Type:WIFI Colour:White Material:Plastic Package Contents: 1 * Human Presence Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. powered by USB 5V/No Hub Needed: the wall mount can be attached to the wall or wherever you need it.and it's powered by USB 5V.,And no need hub to operate.use 2.4G wifi network to pair with tuya app. The Mmwave Radar Presence Sensor can be widely used in lighing,security,home appliance.hotels,garages,buildings.transportation.LOT internet of things and other industries that need to detect human micro-motion,motion and control detection distance Energy Conservation: It can not only be used to detect moving,but also non-moving people.it enables seamless background features,like the litchen light turns on once you enter the room and off after you leave. Smart Human Presence Detector: the human presence sensor adopts millimeter wave radar,sensing human movement and static presence.It can detect the tiniest movement,even breathing and heatbeat. APP Remote Control: It detect macro/micro- enables you to detect human presence within a configured distance.and get alerts in real time via app.