[Doorbell Mode]: Door open chime, 11 Ring tongs for your choice. [4 stages adjustable volume] : Up to 113dB alarm, effectively help to deter the intruder, wake or alert you if at home and possibly alert neighbors. [Colorful Night Light Mode]: No sound , suitable for quiet environments, can be floodlight, when the magnetic sensor activated, the receiver automatically turn on the light, with 4 adjustable levels brightness. [IP64 Waterproof]: Suitable for outdoor/Indoor. [Long Distance Wireless]: it detects movements to the portable receiver from up to 918 feet (280m) away. [Easy to Install & Diy]: Can be set up within minutes. [Fully Expandable System ]: Simply place your motion sensor/or multiple sensors. [Widely application]: Suitable for Railway, home, shops, stores, restaurants... .