Feature:1. 20 Channels: Restaurant calling pager system can send 20 different coding through the combination of numbers 1 to 20, including a 20 channel calling keypad transmitter, and 20 pickup discs, supporting a maximum of 20 discs2. Practical and Efficient: Restaurant pager improves work efficiency with low battery indicator, charging indicator, learning coding registration mode, online lookup, vibration, sound, light flashing, and switchable prompts at will3. Professional Chip: Restaurant calling pager system adopts professional processing chipset, high performance noise reduction coding and decoding circuit, fast heat dissipation and high stability4. Receiving Distance: Restaurant pager external antenna wall receiving distance of 50 to 100 meters, open area working distance of about 1000 meters (3280 feet)5. Scope of Application: Wireless pager systems are used in fast food restaurants, pizza stores, churches and car stores or other places where there are guests waiting for serviceSpecification:Item Type: Wireless Calling SystemMaterial: ABSKeyboard Transmitter:Operating Frequency: 433.92MHZOperating Current: 20030mAStandby Current: 6010mACoding Mode: Learning CodingWorking Temperature: -10 to 60Disc Receiver:Operating Frequency: 433.92MHZStandby Current: <143mAOperating Current:7020mA (buzzer)10020mA (vibration)12020mA (vibration and buzzer)Receiving Sensitivity: -1072dBmBattery Type: Lithium BatterySingle Receiver Battery Capacity: 200mAh (included)Decoding Mode: Learning Coding.Package List:1 x Keyboard Transmitter20 x Disc Receiver1 x User Manual1 x AdapterNote:Receiver shipped with internal battery