Welcome Mode: 5 languages of "Welcome", suitable for shops, stores, restaurants, supermarkets... Doorbell Mode: Door open chime, 36 selectable chimes tunes for your choice. Alarm Mode : Up to 113dB alarm, effectively help to deter the intruder, wake or alert you if at home and possibly alert neighbors. Colorful Light Mode: No sound, 4 colors for your choice, suitable for quiet environments. Night Light Mode: Can be floodlight, when the magnetic sensor activated, the receiver automatically turn on the light, with 4 adjustable levels brightness. 8 chord music chip, 40mm big horn,36 chime melodies 4 stages adjustable volume 【Long Distance Wireless】 The Motion Sensor Alarm has a transmission range up to 280m/918ft in a open space (the distance from the sensors to the receiver).