1、Thank you for choosing the queue wireless calling system. It uses RF wireless technology with millions of different learning codes. 2、Separate storage memory to avoid data loss. The system includes a 999-channel call button keypad and a portable buzzer and vibrating receiver. 3、The call button keypad has 16 battery charging slots. Each receiver is rechargeable and labeled with a number. Perform a self-test when power is on. 4、In standby mode, it is inserted into the charging slot, and the customer places an order, he or she will send a receiver with a number, when the order is ready, press the keyboard to dial the number, the client will get it through the buzzer /Vibration / LED indication. 5、High receiving sensitivity. The queuing system greatly improves the work efficiency and prevents the client from waiting in the long queue. 6、Beautiful and stylish design. It is widely used in fast food restaurants, dessert shops, car 4S stores or other lineup occasions. 16-Channel Keyboard Host x 1Antenna x 1Adapter x 1Power Cable x 1Receiver x 16Instruction Manual x 1 Item Type: Pager Waiter CallingMaterial: ABSGross Weight: Approx. 1896.00gReceiver Technical Data:Working Voltage: DC 3.7V (Rechargeable Battery)Charging Voltage: DC5VWorking Frequency: 433.92MHZStandby Current: 10±5mAWorking Current: 100 + 20mA (Vibration + Buzzer)Receive Sensitivity: 107±2dBmBattery Capacity: 200mAhDecoder: Learning Code (AM)Dimmension: Approx. 51 x 104 x 10mm / 2.0 x 4.1 x 0.4inKeyboard Call Button:Operating Voltage: DC 5 V / 3A Power AdapterWorking Frequency: 433.92MHzStandby Current: 24±5mATransmission Current: 100±30mACoding: Learning Code (AM)Dimmension: Approx. 157 x 234 x 36mm / 6.2 x 9.2 x 1.4inPacking Size: Approx. 30.00 x 30.00 x 5.00cm / 11.8 x 11.8 x 2.0in