【Easy to Install】Simply plug the receiver into an outlet and attach the transmitter to the wall or door frame with the included tape or screws. Without the hassle of cables. 【400M Wireless Range】The penetrating wireless signal can be transmitted up to 400m in an open and accessible space, you will never miss a visitor, even if you are several rooms away or on another floor. The chime does not interfere with other equipment in your home or your neighbors' home. 【55 Melodies & 5 Levels Volume】Doorbell receiver with full and clear sound; press the follow or return button to choose between melodies; 5 volume settings with a maximum volume of 110dB; enjoy the pleasant and beautiful ringtones every time when someone is at a time. front doorbell 【Waterproof and LED Design】The wireless transmitter made of superior material is IP55 waterproof, stable performance is guaranteed for outdoor use. Blue LED on the button and receiver is a visual indication for host and visitor, it is also a fun and