Wireless mechanical door chime DC type

Ding-Dong sound only

Loudness level 75dB

Learning code matching of chime and transmitter to avoid interference

Wireless working range in 100 meters in open area

Multiply matching way of product, one chime can match with ten transmitters , one transmitter also can match with ten chimes

Transmitter with self-name card and IP44 proof for outdoor using.

Frequency in 433MHz

Power of chime 4pcs C size battery

Power of transmitter 1pcs 12V/23A battery