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 mm Receiver size: 100 mm x 66 mm x 30 mm Plug: EU plug TYPE: A: 1 Receiver + 2 Transmitter B: 2 Receiver + 1 Transmitter Note: 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: