【IP68 waterproof】 : The wireless doorbell can withstand the harshest outdoor weather conditions such as heavy rain, snow and scorching sun. We tested it by putting the bell in the water. It shows that the doorbell transmitter can still be used normally even after the water is dried. 【150 m radio 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 still hear the bell. And will not interfere with other electrical signals in your home. 【No battery!】The concept of our wireless doorbell with 2 receivers is environmentally friendly and practical. This doorbell has no battery, so you don't have to worry about changing the battery. At the same time, it also contributes to environmental protection. 【Compatible Design】 : We have studied most household sockets in Europe and developed the most compatible wireless doorbell size, which looks simple but delicate. Suitable for