The SWADS-DOORBK is a doorbell alert system that connects in minutes. With up to 60m range, the receiver unit emits an audible chime and lights up when the Doorbell is pressed with 3 volume levels. You can also use silent mode that comes with flashing blue signal lights. Select from up to 36 chimes to sound when the doorbell is pressed. The unit is easy to mount with double-sided tape, and the system can be coupled with more doorbells for other entrance ways. You can write your name or house number under the button. This product comes with a 12 month warranty.