No wiring required! This very stylish wireless doorbell allows you to easily install the transmitter at your entrance and place the receiver wherever you like. It has a transmission range of up to 300M, 60 melodies, and 5-level volume adjustment, with iPX4 waterproof and dustproof features. * Wireless transmission distance: Up to 300M * Melodies: 60 total (including "ding-dong") * Volume: 5-level adjustment * Color: White * Power supply: Transmitter - 12V23A battery (included), Receiver - 3 x AA batteries * Waterproof: IPX4 * Product dimensions: Transmitter (77 x 46 x 20mm) Receiver (95 x 65 x 24mm) * Transmitter installation: Double-sided tape/screw fixation (included)