Wireless motion sensor: remote transmission, 280 meters indoors, suitable for more places,Home security alarm: an independent alarm clock, maximum 113dB, can scare away thieves and intruders,< /li> Power supply: the receiver uses one AA battery (not included) or USB 2.0 micro-B (not included), the motion sensor uses one AAA battery (not included) or USB 2.0 micro -B (not included)< /li> 5 model options: welcome mode/stamp mode/alarm mode/color light mode/night light mode, meet your demand, < li>Wide application: Not only perfect for home security, but also for shops, hotels, offices and factories. Configuration<br> Frequency: 433 MHz<br> Transmission distance: 280 m (open area)<br> PIR sensor angle: 100 degrees (horizontal) and 15 degrees (vertical)<br> Sensor range: 2~8m<br> Volume: 4 levels<br> Brightness: 4 levels Power supply<br> Receiver: 3 AA batteries (not included) or USB 2.0 micro-B (not included)<br> Motion sensor: 2 AAA batteries (not included) or USB 2.0 micro-B (not included) <br> Security alarms<br> Colorful light and night light mode<br> In this mode, when your family returns after working overtime, the soft light will give you a reminder notice.<br> To protect you from theft , you should can choose the night light instead of the audible alarm as an early warning.