Long Distance Self-Extended Generation Dingdong Volume Waterproof Home Wireless Wireless Door Color 150m Popular Home Door (Black)

When someone rings the doorbell, the eye-catching backlight flashes. It is especially suitable for elderly, deaf and pregnant women. If matched with multiple push units in the system, the beep sound can be set separately for each push unit. Automatically save the selected ringtone after power off. Flexible design, convenient installation, no wires, save money and labor, and move freely. Built-in stereo speaker, especially suitable for office buildings, homes, factories, tourism and other places.