This doorbell uses full digital technique used to ensure zero interference and offers a long communication range of 800m in open space. It offers selectable ding dong, visual or vibration alert for doorbell and has a portable handset with a charging stand. The doorbell has a speaker on the outdoor unit for hearing who’s at the door and can be used to remotely control electric door locks.

• Full digital technique used to ensure zero interference.
• Long communication range of 800m in open space.
• Operate in the 863 - 870 MHz with clear reception.
• Remote control of electric door lock.
• Outdoor unit complied with IP54 standard.
• Out of range alert and low battery alert.
• Selectable ding dong, visual or vibration alert for door bell.
• Outdoor unit can operate with several indoor units.
• Handset equipped with rechargeable Li battery and charger stand.
• Outdoor unit speaker volume remotely control from handset.
• Outdoor unit operates with AC/DC supply or battery backup.
• Let users know when someone is at the door.
• Excellent for improving security.