N92A-2T1 Rainproof Doorbell Adjustable Volume Flashing Light Wireless Home Door Bell,2 Transmitter+1 Receiver - EU Plug/White ?55 ringtones available: Users can set any music as the doorbell ringtone according to their personal preferences ?Adjustable volume: 5 levels of adjustable volume,the loudest volume is 110db ?Large metal speaker: Good resonance effect,clear and loud sound quality ?Strong sound penetrating force: Using high-frequency transmission technology,there is no need to worry about the doorbell not ringing ?Long working distance: The working distance can reach 300 meters in an open and barrier-free environment,the signal is stable and does not interfere with each other ?Rainproof: The transmitter is rainproof,rainy days can also be used normally ?Flashing light design: The light flashing reminder can be used for mute mode ?Specifications: ?Material: ABS ?Transmitter waterproof level: IP55 ?Working distance: 300 meters (open and barrier-free) ?Volume: 0-110dB,five-level adjustment ?Receiver voltage: 110-240V/60Hz ?Transmitter battery: 1 x 12V 23A alkaline zinc-manganese battery (included) ?Ringtones: 55 polyphonic music ?Working frequency: 433.92MHz?��280KHZ ?Working temperature: -20 to +70?? ?Transmitter size: 70x40x15mm ?Receiver size: 70x70x30mm Package included: ?2 x Transmitter (with Battery) ?1 x Receiver ?1 x Pack of Installation Accessories ?1 x English User Manual