Connected doorbell and video door phone - Universal - Automatic doorbells, waterproof electronic doorbells.(white) Highlights Universal Automatic doorbells, waterproof electronic doorbells.(white) Intellectual electronic smart doorbell party Main function 1. self-powered outdoor unit, no battery, more environmentally friendly 2. The outdoor unit waterproof design, pay attention: the PCB plating waterproof membrane, do not shell, circuit board bubble water does not not affect the use can effectively solve the problems that can be used normally in rainy days and also can be used in high humidity environments 3. The slim design of the outdoor unit can effectively prevent the outdoor unit from being maliciously chosen 4. The indoor and outdoor units are made of ABS material (power pin is fire-resistant PC material), and the surface is printed enamel. It is elegant and chic, but also can effectively prevent the shell from being affected by the beauty after light cost-effective 5. Backlight flashes catch eyes when someone pushed the doorbell.particularly suitable for the elder, deaf and the elderly. pregnant women 6. If paired with multiple push units in a system, chime can be set individually for each push unit 7. Automatically saves selected ringtone after power off 8. Flexible arrangement design, easy to install, no wiring necessary, save money and save labor, moving freely 9. Reduction electric voltage, making safety 10. Mini size and beautiful appearance 11.Built stereo speakers, especially suitable for construction office, household, factory, tourism and other places, a wide range of uses