About the device: The base consists of a touch keyboard for entering numbers, in addition to portable receivers (pagers) that are charged within the same base. How it works: When the order is ready, the employee enters the device number given to the customer on the base, which causes the device to vibrate, light up, or make a sound to alert the customer. Technical specifications: These systems usually provide a coverage range of approximately 800 meters and use fixed frequencies that are not affected by other radio signals. The number of devices that can be distributed to employees is 16 devices, and the employee or customer can be paged if the owner or cashier wishes. The price of the device is approximately 1300, selling for 600 riyals.