The Krown LookOut™ wireless telephone transmitter lets you know when you have an incoming landline phone or videophone call. When paired with one of the Krown LookOut™ Series receivers, you will have a wireless range of up to 1,000 ft. Simply pair the telephone transmitter with a receiver, such as the LookOut™ All-in-One Notification System or the LookOut™ Sidekick Receiver.