The Sonic Ring Elite, model TR 75 is one of our top-of-the-line telephone ring signalers. The sleek, modern case has a lamp on/off button to allow the lamp to be used for signaling and normal room lighting. The ingenious power cord with unique Pluglet (Plug-outlet) allows you to keep your table uncluttered by unsightly lamp cords. There is also an indicator light to remind you to turn on the attached lamp. In addition, its advanced design draws very little phone line power*. The Sonic Ring Elite sends a signal to all Sonic Alert remote receivers.