1、Convenient for customers. After ordering, customers can take a rest at the table instead of waiting in line. 2、Guests can sit at any location in the restaurant or stroll around, waiting for the device to remind them to get their food. 3、Made of ABS engineering plastic. High quality, exquisite workmanship, durable and anti-fall, long service life to save the costs. 4、Fashionable and exquisite appearance. Let the guests not only in the dining but in the experience of high-tech dining enjoyment, the satisfaction of being respected. 5、Professional processing chip: imported processing chipset, high-performance noise reduction coding and decoding circuit, fast heat dissipation and great stability. 10 x Receivers Item Type: Pager ReceiverSize: Approx. 10.3x5x 1.1mm/ 0.4x 0.2x 0.04inWorking Voltage: DC 3.7V (rechargeable battery)Charging Voltage: DC5V 4AWorking Frequency: 433.92MHZWorking Current: 75±10mAStandby Current: <12mA±3mADecoding Method: Learning codeBattery Capacity: 200mAhFunction: Smart charging, low battery prompt, online search, vibration, sound, light rotation, free to switch promptsMatching method between the receiver and keyboard transmitter: 1. Power/reset: long press 3 seconds to turn on/off; Short press reset to standby. 2. Code recording SET: press to enter the code recording state; Long press 5 seconds to clear the code. 3. MODE: switch prompt, three modes of vibration/bee cue/vibration+bee cue.