The MyAlert Wireless Telephone Transmitter is a cost-effective way to ensure that you know when your telephone (landline) is ringing. The TR100T has an attractive design to fit any decor and works with the MyAlert remote receiver. When the phone rings, you'll be notified with a clear visual icon, bright flashing LED, and loud amplified sound. Plus, setup is a breeze - simply plug the phone jack into your existing telephone line. Simple one-button pairing so you never miss another call again.