You'll always be aware of your visitors when you install this Hampton Bat Wireless Door Bell Strobe Kit. Alerting you by sound and light, this unit emits a flashing blue LED strobe light when someone rings your doorbell. Boasting a convenient portable design, you can place this wireless doorbell anywhere in your home. It features volume control, three selectable tunes and a wireless push button. Powered by three C batteries, it is compatible with all other Hampton Bat wireless push buttons, door bells and alerts.