Feature:1. 1 Host Controls 20 Pager: Twenty different codes can be sent through a combination of the numbers 1‑20. This queuing system greatly improves work efficiency.2. Multifunctional: Equipped with low battery charging indicator, learn code registration mode, online search, vibration, sound, light flash, can be switched at will prompt.3. Professional Processing Chip: Adopt imported processing chipset, high performance noise reduction coding and decoding circuit, fast heat dissipation, strong stability.4. Receiving Range: External antenna partition wall receiving range of 50‑100m, open area operating range of about 1000m (3280 ft).5. Widely Used: Widely used in fast food restaurants, food courts, pizza parlors, and auto shops or other places where many customers are waiting to be served.Specification:Item Type: Wireless Calling SystemMaterial: ABSKeyboard Transmitter:Operating Frequency: 433.92mhzWorking Current: 200±30mAStandby Current: 60±10mAEncoding Method: Learning CodeOperating Temperature: -10℃-60℃Disc Receiver:Operating Frequency: 433.92mhzStandby Current: < 14±3maWorking Current: 70±20ma (buzzer)100±20ma (vibration)120±20ma (vibration + Buzzer)Reception Sensitivity: -107±2dbmBattery Type: Lithium BatterySingle Receiver Battery Capacity: 200mah (including)Decoding Mode: Learning Code.Package List:1 x Keyboard Transmitter 20 x Receiver1 x User Manual1 x Adapter