The TS-10U is a portable wireless transmitter. When a wireless alert signal is sent from the transmitter to the RC20U receiver - it can be used as a wireless doorbell, desk buzzer, room chime or even a panic button.
OPTS10 Handheld Transmitter - Specifications
Compatible with RC-10U (Chime Box Receiver with relay)
Design for easy grip
Belt clip and knock-out for a key chain pendant
Wall mount option
Over 8 million codes possible, eliminating interference from neighbors