1、20 Channels: Wireless calling system includes a 20 channel call keypad transmitter and 10 pickup discs. Ten different coding can be sent via a combination of numbers 1 to 10 2、Practical and Convenient: Pager systems have low battery indicator, charging indicator, learning coding registration mode, online lookup, vibration, sound, light flashing, switchable prompts at will, and support up to 20 discs 3、Professional Chip: Restaurant calling pager system adopts professional processing chipset, high performance noise reduction coding and decoding circuit, fast heat dissipation and high stability 4、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 and car stores or other places where there are guests waiting for service Item Type: Wireless Calling System Material: ABS Keyboard Transmitter: Operating Frequency: 433.92MHZ Operating Current: 200±30mA Standby Current: 60±10mA Coding Mode: Learning Coding Working Temperature: -10℃ to 60℃ Disc Receiver: Operating Frequency: 433.92MHZ Standby Current: <14±3mA Operating Current: 70±20mA (buzzer) 100±20mA (vibration) 120±20mA (vibration and buzzer) Receiving Sensitivity: -107±2dBm Battery Type: Lithium Battery Single Receiver Battery Capacity: 200mAh (included) Decoding Mode: Learning Coding 1 x Keyboard Transmitter 10 x Disc Receiver 1 x User Manual 1 x Adapter