Strong Signal for Long RangeThis white waterproof wireless chime has 2 bells, The penetrating wireless signal can be transmitted up to 300m in an open space and long distance even with many obstacles (doors, walls). You no longer miss any of your visitors. The chime does not interfere with other equipment in your home or your neighbors. 36 Melodies and Volume 4-LevelsSpeaker high quality, adopt the most stable music chip, built-in 36 melodies, create clear and pure sound. Four volume levels adjustable from 25db to 85db. When the bell rings, you can easily hear it around the house. Memory function is available for sound and chime selection. Waterproof and Smart LED DesignThe wireless transmitter made of premium material is waterproof to IP44 standard, 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 design fun and detailed for the hearing impaired. Visitors know if they have used the correct doorbell because it lights up when in use. Easy to InstallSimply plug the receiver into an outlet and attach the transmitter to the wall or door frame using the adhesive tape or screws provided. Without the hassle of cables.