150M Long Range Wireless Doorbell with 38 Melodies, 433.92MHz Frequency, IP44 Weatherproof - Perfect for Home, Classroom, Office & Outdoor Use (Black)

1. 38 music songs to choose, choose a special ring tone different from the neighbors, not afraid of hearing the wrong sound.

2. Using 433.92 frequency wireless signal, strong penetration, can penetrate 3-4 doors, open area receiving distance up to 150 meters.

3. Using learning code technology, do not worry about and the same doorbell with neighbor.

4. At the touch of a finger, kinetic energy is converted into electrical energy, transmitting wireless signals instantaneously, no battery required.

5. The volume of 3 levels can be adjusted freely, without wiring, and can be turned into a call device. The elderly, babies and pregnant women stay alone just press it.