... calling button on each customer' s table, and watch receiver for waiters2 This system is wireless, it's very easy to operation, needn ... waiter check the calling information, and then go to service for the calling customerFeatures of GDH5001, Compatible with different kinds of ... number loop time, or no loop3, 5-90 seconds optional for music time, or continuous playing4, Recipient Capacity up to 1000 ...