Features: 1Each pager built-in rechargeable lithium battery, low power indicator and charging indicator 2Support learning code registration mode, you can easily add up to 999 pagers 3Have two remind mode of vibration and buzzer, each mode is accompanied by LED flashing 4Equipped with up to 20 battery charging slots, greatly improve the work efficiency and avoid the guest waiting in a long queue 5External antenna support about 1000 meters (3280ft) working distance in open area 6Widely used in fast food restaurants, food courts, pizzerias, churches, car shops or other places where many customers are waiting for service Item Type: Wireless calling system Pager Frequency: 433MHz Receiving Sensitivity: -107dBm Decoder: Learning code (AM) Standby Current: 10mA Working Current: 75mA (vibration) Menu Battery Capacity: Built-in 200mAh rechargeable lithium battery Charging Voltage: DC 5V Keyboard Call Button: Frequency: 433MHz Standby Current: 24 mA Transmission Current: 100 mA Working Voltage: DC 5V / 2.5A power adapter Key Function: Power/Reset: Long press for 3 seconds to turn on/off short press to reset to standby Code Recording: Long press for 3 seconds to enter the code recording state Mode: Switch the remind mode, dial up for vibration mode dial down for vibration buzzer mode Keyboard: Press 0~9 digits to select the number you want to call: 1~999, then press the call key to call. If the wrong number is selected, press the clear key to reselect the number. 1 x Keyboard Transmitter20 x Menu1 x Power Adapter1 x Antenna1 x User Manual