Usage Tips:1. Operating Range: Up to 918ft2. Chime Tunes: 36 Selectable Chimes3. Volume : 4 Volume Levels from 113dB to 25dB.4. LED Flashing Light: With 4 colors LED light, Color/Red/Blue/Green, 4 levels adjustable brightness5. Mode: Welcome/Doorbell/Alarm/Colorful light/Night Light Mode6. Available for pairing, extendable up to 32 magnetic sensor/vibration sensor/PIR motion7. Great for business/office/store/garage/apartment/home security, kids safety, shop door entry chime5 Modes:1. Welcome Mode: 5 language of "Welcome", suitable for shops, stores, restaurants, supermarkets...2. Doorbell Mode: door open chime, 36 selectable chimes tunes for 3. Alarm Mode: up to 113 dB alarm, effectively help to deter the intruder, wake or alert you if and possibly alert neighbors4. Colorful Light Mode: no sound, 4 colors for , suitable for quiet environment5. Night Light Mode: Can be floodlight, when the magnetic sensor activated, the receiver automatically turn on the light, with 4 adjustable levels brightnessColour:WhiteMaterial:ABSPackage Contents:1 x Alarm1 x ReceiverOnly the above package content, other products are not included.Note: Light 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.