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. Item Type: Pager Waiter Calling Material: ABS Gross Weight: Approx. 1896.00g Receiver Technical Data: Working Frequency: 433.92MHZ Standby Current: 10±5mA Working Current: 100 + 20mA (Vibration + Buzzer) Receive Sensitivity: 107±2dBm Battery Capacity: 200mAh Decoder: Learning Code (AM) Dimmension: Approx. 51 x 104 x 10mm / 2.0 x 4.1 x 0.4in Keyboard Call Button: Working Frequency: 433.92MHz Standby Current: 24±5mA Transmission Current: 100±30mA Coding: Learning Code (AM) Dimmension: Approx. 157 x 234 x 36mm / 6.2 x 9.2 x 1.4in Packing Size: Approx. 30.00 x 30.00 x 5.00cm / 11.8 x 11.8 x 2.0in 16-Channel Keyboard Host x 1 Antenna x 1 Adapter x 1 Power Cable x 1 Receiver x 16 Instruction Manual x 1