ELPA Wireless Call Transmitter EWS-T03

This chime allows customers to call staff at restaurants, salons, and other stores. Wireless for easy installation. The transmitter and receiver are used as a set. (One transmitter is required as an erase button.) The communication distance is 100m line of sight. Using a repeater extends the signal range even further. Up to 60 transmitters can be installed! High performance yet affordable! Don't miss the price! Communication Method: Specific Low-Power (426MHz band) Communication Distance: Approximately 100m line of sight Pairing ID: Approximately 260,000 combinations Usage Environment: Indoor (non-waterproof), Operating Temperature Range: 0-40°C Power Supply: DC3V (Uses two AAA alkaline batteries, sold separately)