Connected doorbell and videophone - Universal - Automatic doorbell, long distance remote control, American standard, European standard, no battery, waterproof, one for one (white) Highlights Universal Automatic doorbell, long distance remote control, American standard , European standard, no battery, waterproof, one for one (white) Home Doorbell self-powered, long distance remote control, American standard, European standard, no battery, waterproof elderly calling machine, one for one Party remote control remote control remote control without battery and waterproof Product name: wireless self-powered doorbell White color Material: Plastic Weight: 0.455kg Product volume: 10.0cm*10.0cm*10, 0 cm Features: Function 1: Remote control Function 2: IP44 waterproof rating Function 3: strong signal Function Four: Song mobile phone series Ringtone table Function 5: More than one doorbell, bind the doorbell, life is more interesting Function 6: Differentiate and set ringtones. You can set different ringtones for different buttons to easily distinguish between front and back doors. Function 7: Not only a doorbell, but also a pager