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 Frequency: 433 MHz Transmission distance: 280 m (open area) PIR sensor angle: 100 degrees (horizontal) and 15 degrees (vertical) Sensor range: 2~8m Volume: 4 levels Brightness: 4 levels Power supply Receiver: 3 AA batteries (not included) or USB 2.0 micro-B (not included) Motion sensor: 2 AAA batteries (not included) or USB 2.0 micro-B (not included) Security alarms Colorful light and night light mode In this mode, when your family returns after working overtime, the soft light will give you a reminder notice. To protect you from theft , you should can choose the night light instead of the audible alarm as an early warning.