... , karaoke lounges, bars, night clubs, cafeterias, tea houses, bowling alleys, bathe rooms, massage house, ... environment for customers.Waiters will have more time to do other things.Table calling system ... of the meal for more food, drinks, bread, butter, wine, dessert, coffee, bill, etc. ... numbers simultaneouslyIt could be placed on the table or hung on the wallSpecifications of GDH100YFrequency: ...