There are two kinds of communication devices for Mala Tang, namely the vibration reminder of voice broadcast. The voice broadcast calling device consists of a sending host and a receiving display host. After the waiter enters the meal pick-up number, the display host displays the current meal pick-up number and broadcasts it by voice (inviting customer XXX to pick up the meal at the bar). Vibration reminder, also called mobile vegetable picker, is composed of transmitter+vegetable picker+charger. When the guest enters the store to order food, the waiter gives the guest a dish extractor, and then the guest takes the dish extractor to find a vacant seat to wait for the meal. After the meal, the waiter calls the corresponding dish number on the delivery host. At this time, there will be vibration, flash, sound and other tips in the food fetching device held by the guests, and they can directly take food from the top. ) The price of two kinds of demand is different, the first one is several hundred yuan, and the second one depends on the quantity demand of vegetable fetching devices. For details, please consult Baidu Jiaxun, the manufacturer is in Beijing.