Strong Signal for Long RangeThis waterproof wireless doorbell has 2 Transmitter 1 Receiver, 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. Waterproof and intelligent LED designThe wireless transmitter in Superior material is waterproof to the 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 fun and careful design for the hearing impaired. Visitors know if they have used the correct doorbell, because it lights up when used. 36 Melodies and 4-Level VolumeHigh quality speaker, adopt the chip of most stable music, 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. Easy to InstallSimply plug the receiver into an outlet and attach the transmitter to the wall or door frame using the supplied adhesive tape or screws. Without the hassle of cables. < p>Long Range 300 Meters The signal can be transmitted up to 300 meters in an open space. Even if they are separated by walls or doors, they can respond well. The frequency between the two is unique, you will have no worry about interference with other remote controlled devices. Waterproof and dustproof IP44 waterproof and Dustproof, Suitable for indoor and outdoor use. The wireless doorbell can be used in the range of -20 -65, You don't have to worry about sunshine, rain, snow or other extreme weather conditions such as freeze. Blue LED indication When the button of the wireless door bell is pressed, the blue LED indicator of the transmitter and receiver will flash, giving you a visual notification, this is a great feature for the hearing impaired. What will you get? 2 * Waterproof transmitters 1 * Receivers wireless doorbell The wireless chime is easy to use. Two receivers can be placed anywhere, you will never miss your visitor Features: Internal sounds: 36 chimes Volume: 4 levels adjustable (25db ~ 85db) Wireless range: 300M/1000 ft maximum Transmitter power: 1 x 12V 23A battery (Not included) Input voltage: AC110-240V 50/60HZ Waterproof (transmitter): IP44 Note: Avoid environmental factors, such as metal, which could affect the range of the chime.