300m remote control range with 36 ringtones and 4 adjustable volume levels to suit various ocns. Includes receiver that does not interfere with other household devices or neighboring systems, ensuring you never miss a visitor even when in another room. Simple and convenient design for enhanced user experience. Plug the bell into the socket, remove the tape from the sensor, and attach it to the door frame. Waterproof construction makes it a reliable choice for home, office, store, and similar environments. Specifications: Transmitter: Equipped with indicator light; press to activate Receiver: Plug-and-play operation with ble chime and visual indicator Music options: 36 selectable melodies Volume control: 4 adjustable levels, including silent mode Transmitter power: 1 x 12V 23A battery (battery not included) Receiver power: AC 110V–220V Suitable for: Offices, homes, retail stores, factories, and other commercial or residential spaces