NEVER A BATTERY FOR PUSH BUTTON AND RECEIVER: Door bell push button and doorbell chime as kinetic push button generates energy to create a wireless signal. Never miss a visitor because of a dead battery
LONG RANGE UP TO 760 FEET： in open area through 1 remote button controlling 3 doorbell，IPX6 waterproof，works between -4 °F to 140 °F; withstands various harsh weather conditions
EASY INSTALLATION：plug the receiver into an electrical outlet,the push button transmitter can be fixed to the front door with the provided screws,or stick it to the door.
WELL POLISHED DESIGN:unique round shape,PMMA Crystal material appearance,built-in nightlight function, no effect on sleep,also free to codes for learning
