Long Distance Transmission , Operates at a highest distance up to 1000ft in open air. Strong Working Signal doorbell for most material door or wall, including glass, metal, wood...
Wireless Multiple Doorbell , You can expand 20 door bells receivers remote door buttons transmitters .
52 Ringtones and Four levels Volume to Adjust The door bell will keep the setting when power is removed.
IP55 Waterproof Easy to Install , 1. Wireless no batteries required plugin door bell chime 2. Mount the remote door button battery powered by sticky pad or anchors screws.
Friendly customer service in 24hrs to make sure your 100% satisfaction, we offer refund or replacement for the unsatisfied products within 18 months of delivery.