The all new, state-of-the-art, DB 200 is the only doorbell and intercom signaler that requires no wires and can be installed in seconds. Unlike competing models, the DB 200 is not triggered by sound, so annoying false alarms are a thing of the past. Features: • Selectable number of flashes (5 or 10), different flash code for front door, rear door, or intercom (requires additional sensor, sold separately). • Built-in chime for hearing members of the family (can be turned off). • Built-in outlet to flash an attached lamp and each sends a signal to all Sonic Alert remote receivers. • Being a telephone signaler. Just plug the phone cord into a modular telephone jack. Its low equivalent number does not draw any phone line power. • Brand new in box with five year manufacturer honored warranty