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 discs 2. 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 will 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, churches and car stores or other places where there are guests waiting for service Specification: 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 . Package List: 1 x Keyboard Transmitter20 x Disc Receiver1 x User Manual1 x Adapter Note: Receiver shipped with internal battery