Hree-in-one Smart Home Welcome DoorbellFunction:1. 32 songs optional.( for doorbell button)2. Doorbell, alarm, welcome multi-purpose.3. Can learn up to 30 transmitters, no loss of power.4. Support 1527/2262 code chip.(button)5. Volume 4 adjustable.?No mute mode?6. Support multiple doorbell transmitter, suitable for large house.Smart Wireless DoorbellWhen you press the button,doorbell will receive the signal and you will hear the sweet tunes immediately.Touch Button Daily Life WaterproofWarm Prompt: In order to ensure that the doorbell button can be used normally for a long time, please place it under the eaves or buy a rain cover.32 Songs Optional32 ringtones for your option,you can select regularly,and don't feel bored.Avoid the same ring with the neighbors.Easy to install,we have EU,US,UK,AU PlugJust plug the receiver into power socket and Stick the button on the door.Strong signal ,150m long distance TransmissionLong operating range can be up to 500ft(150m) in open space,great for large house including villas, apartment, offices, shops, warehouses, etc.Infrared Detecter Welcome Mode:When the infrared detects a moving object will send a signal to the doorbell, the doorbell emits a welcome sound.This mode is usually used in store to welcome customers.Pir sensor power supply:USB cable charging or 2 AAA batteries (not included)Door Sensor Alarm Instantly Mode:Install the door sensor on the door or window. When someone pushes open the door and window, the doorbell receives the signal and will alarm immediately.