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The queue wireless calling system set consists of one 20-channel keypad wireless calling button base and 20 pcs wireless calling receivers. The keypad call button base has 20 output charger slots, and it can transmit 20 different codes by keypad button. While the customer places an order, he(she) will be dispatched one receiver with a number, when the order is ready, press the keypad to call the number, the customer will get it through the buzzer/vibration/LED indications. The queue system greatly improves the work efficiency and avoids the client waiting in a long queue. So it is widely used in fast food restaurant, food court, clinic, church and auto shop or other queue occasions.