1. 3 digit number display 2. 7 segment display receiver 3. 433.92mhz wireless receiver 4. Aluminum Alloy Shell
How take a number waiting system work : give a numeric serial number within 999 to the customers, when order is ready just press the number you want to call, the waiting number system will voice accompanied by number display on the screen, easy to alert the guests their food is ready, user friendly operation.