1. Waterproof call button 2. 7 segment display receiver 3. 433.92mhz wireless call system 4. Aluminum Alloy Shell
1. Simple call button 2. 7 segment display receiver 3. 433.92mhz wireless waiter call system 4. 3.7V Lithium battery waiter watch
1. Waterproof call button 2. 7 segment display receiver 3. 433.92mhz wireless waiter call system 4. 3.7V Lithium battery wrist watch