1.Audio doorbell 2.Electric controlled lock release 3.Durable and clear voice 4.Easy DIY installation

1.Audio doorbell for building system

2.Two wire installation

3.Suitable for already decorat houses

4.Talking distance above 150m

5.Excellent sound quality without squeal and echo

Power	providing by mainline
Outline dimensions	188*87*62mm
Installation	surface mounted
Function	intercom  ,unlocking

compatible audio intercom doorbell