doorbell, Smart Home doorbell, Remote Control doorbell, Waterproof, knvbn-555 (D As shown)

Self-powered, no battery button, no need to install batteries.After pressing, the kinetic energy is converted into electric energy, which is energy-saving and friendly, which is more convenient.Really waterproof, don't worry about using it for a long time in heavy rain.It will not heat up after being inserted for a long time. Security is higher.the receiver into the socket , Press the button on the exterior wall to remind.Music: 36 pieces of musicPower supply voltage: 4.5 (V)Power consumption: 2 (W)Working radio frequency 433.92MHzWorking voltage: 2x1.5V AA batteryScope of application: Household useType: DoorbellSize: As shown in the picturePacking listDoor bell * 1

• Self-powered, no battery button, no need to install batteries.After pressing, the kinetic energy is converted into electric energy, which is energy-saving and friendly, which is more convenient.Really waterproof, don't worry about using it for a long time in heavy rain.It will not heat up after being inserted for a long time. Security is higher.the receiver into the socket , Press the button on the exterior wall to remind.