280M Waterproof Wireless Doorbell

This wireless doorbell is touchless button design, easy to install and convenient to operate, high and low voltage separate circuit design. Features: Touched button configuration in code mode. Touchless button design, high and low voltage separate circuit design. Transmitter without screw chuck design, waterproof and dustproof. PCB is stable on both sides, and the chip sleeps at a micro level Microprocessor controlled, double-sided PCB micropower design. Specifications: Color: white, black (optional) Receiving distance: 280m (open area) Volume: 4 files (can be muted) 0-90db Power: ?0.5W Sensitivity: ?-105dBm Ringtones: 58 chord music can be selected Transmitter battery: 1 * CR2030, 3.7V, 300mAh Transmitter size: 90 * 40 * 15mm / 3.5 * 1.6 * 0.6in Receiver size: 110 * 60 * 20mm / 4.3 * 2.4 * 0.8in Package size: 138 * 77 * 63mm / 5.4 * 3.0 * 2.5in Package weight: 171g / 6.0ounce Package list: 1 * Transmitter 1 * User manual 1 * Receiver