Features: Simple design, highly sensitive and convenient to use, small and lightweight. IP55 waterproof rating, outdoor installation, not afraid of wind and rain. 36 kinds of chord music ringtones are available, pleasant and beautiful. Transmission distance can be up to 200 meters in the open environment, no wrong or disordered ringing. 4 volume levels including mute enable you to adjust according to your own requirements. Stable wireless signal, easy to install, just plug and play, saving time and effort. Specification: Condition: Brand New Material: ABS Color: Shown as picture Optional Type: 1V1 (1 transmitter 1 receiver), 1V2 (1 transmitter 2 receivers) Optional Plug Type: US 110-240V, EU 110-240V Transmitter Battery: One 12V23A battery (built-in) Volume: 0~100db, 4 volume levels adjustable, including mute Ringtones: 36 chord music ringtones Waterproof Rating: IP55 Transmission Distance: 200m (in the open environment) Package List: 1 * Transmitter 1/2 * Receiver (optional) 1 * Glue 1 * User Manual 1、Simple design, highly sensitive and convenient to use, small and lightweight. 2、IP55 waterproof rating, outdoor installation, not afraid of wind and rain. 3、36 kinds of chord music ringtones are available, pleasant and beautiful. 4、Transmission distance can be up to 200 meters in the open environment, no wrong or disordered ringing. 5、4 volume levels including mute enable you to adjust according to your own requirements.