Waterproof Wireless Doorbell NO Battery EU Plug LED Light 150M Long Range Smart Door Bell

Features:A self-powered doorbell that requires no battery.Wireless range up to 150 meters (in open area).4 volume levels between 0-110dB (can be set to mute).51 ringtones.Easily maintained and fixed.Prevents interference in design, the signal will not interfere with each other.Specifications:Transmitter size: 75 mm x 45 mm x 18 mmReceiver size: 100 mm x 66 mm x 30 mmPlug: EU plugTYPE: A: 1 Receiver + 2 Transmitter B: 2 Receiver + 1 TransmitterNote:1. The button cannot be placed on an iron door because it will interfere with the signal.2. Works in heavy raining, however we recommend buying a waterproof cover for long-term use. Otherwise, the life expectancy will be shortened.Detail Pictures: