Features 1??Convenient for Guests -- Guests can rest in the empty space after ordering, no need to wait in line at the bar 2??Super Long Transmission Distance -- Guests can sit anywhere in the store, or hang out around, waiting for reminding you of the meal 3??ABS Engineering Plastic Material -- Military quality, exquisite workmanship, durable and durable, long service life, saving shop costs 4??Wireless Receiver -- Stylish appearance, so that guests can enjoy the dining experience and the satisfaction of being respected not only in the dining but in the experience of high technology 5??High-end Professional Processing Chip -- Using imported processing chipset, high-performance noise reduction coding and decoding circuit, fast heat dissipation and strong stability Specification Features: 1. Convenient for Guests -- Guests can rest in the empty space after ordering, no need to wait in line at the bar 2. Super Long Transmission Distance -- Guests can sit anywhere in the store, or hang out around, waiting for reminding you of the meal 3. ABS Engineering Plastic Material -- Military quality, exquisite workmanship, durable and durable, long service life, saving shop costs 4. Wireless Receiver -- Stylish appearance, so that guests can enjoy the dining experience and the satisfaction of being respected not only in the dining but in the experience of high technology 5. High-end Professional Processing Chip -- Using imported processing chipset, high-performance noise reduction coding and decoding circuit, fast heat dissipation and strong stability Specification: Keyboard Transmitter: Size: Approx. 120 * 80 * 30mm / 4.7 * 3.1 * 1.2in Working Frequency: 433.92MHZ Working Current: 200??30mA Standby Current: 60??10mA Coding Method: Learning Code Receiver: Color: Purple Size: Approx. 69 * 69 * 12mm / 2.7 * 2.7 * 0.5in Working Frequency: 433.92MHZ Working Current: 130??20mA Standby Current: