Doorbell Strong Battery: Wireless doorbell is powered by a rechargeable lithium battery. When the battery is low, the doorbell receiver will sound a voice prompt to tell you which unit needs to be charged. The upgraded receiving battery lasts 12 days on a full charge, and the Door Bell transmitter battery can be used for 4 months on a full charge.
Wireless Doorbell Kit: We have pre-paired doorbells ready to be used out of the box. Install doorbell transmitters wherever you want. Enjoy our two way intercom wireless doorbell for the first time after fully charging the Door Bell!
Wireless doorbell kit including: 1 transmitters, 2 receivers, 1 double-sided mounting tapes, 2 type C power cords, 2 Doorbell power bricks, 1 SANZUCO Wireless doorbell user instruction


