• Smart memory: automatically memory-selected ringtones after power are turned off. with 4 volume levels, 0-110DB adjustable, and 58 ringtones
  

• There exist 4 modes to adjust for this doorbell, they are ring + LED flash, LED fash only, ring only, and ring + LED always on 

• Operating distance: 150 meters in an open space (distance varies according to different operating environments)

• Remote doorbell: the doorbell has a long signal transmission distance, which is very suitable for large houses, office buildings, classrooms, etc.

• Easy to install: plug and play! Easy and simple for using
  

Specifications:

• Transmitter:

• Working voltage: press to generate electricity without battery

• Standby power consumption: 0uA

• Transmitting power: <10mW

• Transmission frequency: 433.92 Mhz

• Button: 1

• Transportation and storage temperature/humidity: -20~60℃/≤85%RH

• Operating temperature/humidity: -20~60℃/≤85%RH

• Product size (mm): 41.6 x 66.43 x 20.58mm

• Weight: 33.6g

• Receiver:

• Working voltage: AC220V 50HZ

• Standby power consumption: <3W

• Transmission frequency: 433.92 Mhz

• 3 buttons: volume button, song selection button, and mode button

• Music: 58 songs

• 4 modes: ring + LED flash, LED flash only, ring only, and ring + LED always on

• Speaker: 16Ω/0.25W

• Transportation and storage temperature/humidity: -20~60℃/≤85%RH

• Operating temperature/humidity: -20~60℃/≤85%RH

• Product size: 60.13 x 90 x 68.7mm (EU Plug)

• Weight: 68.3g