Self-contained entrance alert with motion sensor and a built-in chime. Great product for smaller shops, stores and business offices, who wants a simple and effective heads-up when someone walks through a door or any monitored areas. Voice/alarm/music mode for you to select with mode button according to the need, “Dingdong, hello, welome”in voice mode; about 15 seconds continous alarm sound in alarm mode; play the music you select in music mode. 4 levels volume adjustable with volume button; total 32 musics selectable with music button. Voice/alarm/music mode for you to select with mode button according to the need, “Dingdong, hello, welome”in voice mode; about 15 seconds continous alarm sound in alarm mode; play the music you select in music mode. 4 levels volume adjustable with volume button; total 32 musics selectable with music button. Up to 90dB alerts with 4 volume levels, and the LED light indicator flashes to give visual alerts. Never have to worry about missing a customer or knowing someone unexpected. Comes with a detachable bracket to stand on and allows it to swivel up and down so it can be positioned in the direction you like, and you can use it whenever you want; Apply the adhesive patch to affix the doorbell to your wall or use the provided screws to secure it in place. All the required accessories are included in the package for an effortless setup., Manufacturer: GERUI