... on each customer' s table, and watch receiver for waiters2 This system is wireless, it's very easy ... check the calling information, and then go to service for the calling customerFeatures of GDH5001, Compatible with different ... time, or no loop3, 5-90 seconds optional for music time, or continuous playing4, Recipient Capacity up ... the wall. GDH500 LED waiter calling system for restaurant, cafe, hotel