The Sonic Ring Elite, model TR75-VR is a telephone ring signaler and has a lamp on/off button to allow the lamp to be used for signaling and normal room lighting. The signalers install simply by plugging into an electrical outlet and a modular telephone jack. When the phone rings, a light plugged into the signaler will flash to alert you. There is also an indicator light to remind you to turn on the attached lamp. The Sonic Ring Elite sends a signal to all available Sonic Alert remote receivers. Only one telephone signaler is required in a home, even if you have many telephone jacks. With the Sonic Alert Signaler TR75VR model you can select a unique flash pattern for your telephone, TTY, fax or videophone with the flip of a switch. This device is part of the TDDP program.