1. Professional Processing Chip: Coaster paging system adopts high performance noise reduction coding and decoding circuit, fast heat dissipation and high stability.2. Multifunction: Low battery indicator, charging indicator, learning code registration mode, online search, vibration, sound, light flashing, switchable prompts at will, maximum support 20 pagers.3. Working Distance: The external antenna receives 50 to 100 meters across the wall, and the open area working distance is about 1000 meters (3280 feet).4. Included Kit: Pager system includes a 20 channel call keypad transmitter, and 10 pagers. 10 different codes can be sent through the combination of numbers 1 to 10, improving work efficiency.5. Widely Used: Pager system is widely used in fast food restaurants, food courts, pizza stores, churches and car stores or other places where there are many guests waiting to be served.Specification:Item Type: Wireless Calling SystemMaterial: ABSKeyboard Transmitter:Operating Voltage: DC5V Operating Frequency: 433.92MHZOperating Current: 200±30mAStandby Current: 60±10mACoding Mode: Learning CodeOperating Temperature: -10℃ to 60℃Disc Receiver:Working Voltage: DC3.7V (Rechargeable Battery)Charging Voltage: DC5V Operating Frequency: 433.92MHZStandby Current: Operating Current: 70±20mA (Buzzer)100±20mA (Vibration)120±20mA (Vibration, Buzzer)Receiving Sensitivity: -107±2dBmBattery Type: Lithium BatterySingle Receiver Battery Capacity:200mAh (Included)Decoding Mode: Learning CodeVoltage: 100-240V How to Use:plug and playpacking list:1 x Keyboard Transmitter10 x Receiver1 x User Manual1 x Adapter