ECO-FRIENDLY BATTERY FREE BUTTON - Eco-friendly and battery-free transmitter converts the pushing force into electrical energy and provides radio signals to the plug-in receiver. there is no more hassle in buying or changing batteries ever again.
WEATHERPROOF for OUTDOOR USE - IP7 waterproof transmitter can be completely submerged underwater, working temperature is -40 degree F - 140 degree F, make it endure harsh weather or downpour; the sandblasted surface is wear-resistant and scratchproof
RELIABLE FUNCTIONS - Widespread operating range of over 500 feet (1000 feet in open area). 32 melodies with 4 levels of adjustable volume from 10dB to 100 dB. Advanced code-pairing technology.
MEMORY FUNCTION - Preserves your last set melody and volume level after a power outage; no need to reset to your previous settings; convenient and easy to use design for a better user experience
LED FLASH ALSO CAN BE A LED LIGHT - Multifunctional use as a night light for soft light beams in the dark; flashes along with the traditional and fun melody chime to visually indicate that someone is pressing the doorbell; only uses 1 kWh of power a year