DISCONTINUED.  Take a look at the Safeguard unit instead.  

Simply plug the chime into any 120V wall outlet and receive unique chimes for up to three doors along with a strobe notification. Different channels can be set up so multiple chimes can be used in the same building. Push button doorbell uses a 3V battery (included). Add additional push buttons for notification of multiple doors.

Features:

• Range up to 125 feet
• Selectable channels
• Distinct chime to distinguish between doors
• Strobe flashes the same for all WP180USL doorbell push buttons
• Can add additional push buttons
• Includes mounting hardware and 3V CR2032 battery for chime
• UL Listed

Please note that the WP180USL model is not compatible with the previous model, WC180.