Have you ever been in a restaurant where you are ready to place your order, but you can"t find waiter anywhere? This wireless waiter/server call paging system is gonna solve your problem.Increase sales and improve service with easy to install plug & play and low maintenance.The Transmitter Bell:For restaurant use, this wireless transmitter bells are typically placed on or attached to each table. When a guest wants his or her server, he/she presses the button of a service bell, which sends a signal to the central receiver. The Receiver displays numbers, usually table numbers, which the guest has sent, and flashes briefly and beep sounds to indicate that a new call has been received.The wall mounted Receiver panel (digital LED display):Is a control terminal that can be located at a waiter station, in the kitchen, at the host"s desk, or wherever else may be convenient. This device can optionally sound an alert notifying that a call has been received, and it will display the number of the call bell, which in restaurants is usually coordinated with the table number, requesting service.Applications:Tea or coffee house, spas and salons, health and fitness Clubs, restaurants, hotel conference rooms, executive dining rooms, Saloon, nightclubs, bowling alleys, massages house, churches, casinos, golf and country clubs, hospitals, health clubs, and officesSpecificationWorking Voltage: DC12V Audio Output : 10mW Working Currency: 450mA Frequency: 433MHZ package includeWireless receiver x 1 3Key Transmitter x 21 Power adapter x 1 Menu Holder not include