[Wireless Long Range] Long operation range is up to 300 meters / 1000-ft in the open area, the strong and stable wireless signal ensures that you can hear the doorbell chime clearly, even if you are a few rooms away or on another floor. [38 Tunes] The Plugin doorbell receiver bell has featured 38 tunes and 4 adjustable volume levels ranging from 0 to 85 dB. It will remember your settings even if power outages. [Waterproof Doorbell Button]The transmitter is waterproof for raindrops, which ensures perfect performance in the outdoor environment. The doorbell could work between -30 °F to +65 °F withstand any weather conditions [Unique Design] Compact design and easy to use, plug receiver won't block other sockets. [Easy to Install and Set] Simply plug the receiver into a power outlet and attach the transmitter to the exterior wall with the provided screws or adhesive patch; there is no need to reset the tune and volume level after a power outage.