【IP68 Waterproof】: The wireless doorbell can withstand the harshest outdoor weather conditions such as heavy rain, snow and scorching sun. We tested it and put the doorbell in the water. It shows that the doorbell transmitter can still be used normally after the water is dry. 【150m Wireless Range】: The range of the doorbell receiver can reach a radius of 150m , suitable for apartment, villa and garden. Even if you are in the garden or on the second floor, you can hear the bell. And won't interfere with other electrical signals in your home. 【No Battery!】: Our wireless doorbell design with 2 receivers is eco-friendly and convenient. This doorbell does not have a battery. So you don't have to worry about replacing the battery. At the same time, it also contributes to environmental protection. 【Compatible Design】: We have studied most household sockets in Europe and designed the most compatible wireless bell size, which looks simple yet delicate. Suitable for most households in Europe.