All-in-one Wireless Motion Sensor Alarm System can be used as an alarm system for your home, shop and indoor place. Features: No need to worry about drilling cable holes. 0-8m detection range and 110 detection angle Multiple installation methods: Stand-up InstallationCeiling InstallationWall Mounted Installation Come with a remote control, you can control the motion sensor alarm at anywhere! Specifications: Detection Range: 8m Detection Angle: 110 degrees Alarm Siren: 120 dB Working Humidity: Tips 1.USB cable cannot charge product or battery. If you use USB to power the product, you need to plug the USB into the power supply all the time. 2.Do not install the product in a place where it is exposed to rain, long periods of direct sunlight, and where temperature will change rapidly.