Sonic Alert DB200 Deluxe Wireless Doorbell with Lamp Flash and Telephone Signaler for the Deaf and Hard of Hearing Individuals Alerts to doorbell and phone/videophone calls Plug for flashing lamp notification with selectable number of flashes Flash code for front and rear doors Sends a signal to any SonicAlert traditional system receiver Requires no wires and installs in minutes and built in chime (can be turned off)