Press pager(APE560), then the wireless receiver(APE9500) will receive the signal of pager, and someone will come to provide service. For customers to notify the waiters. Don"t know which to buy? Please contact us. Most of customers will receive the package in 7--14 days. Have you ever in a restaurant, in here you ready to take your order, but you can"t find in any place the waiter or waitress? The wireless attendant or server call paging system can solve your problem. Wireless fluid system is widely used in the service area. It includes the button for guests to use and the signal receiver for waiters to use. When the guest is in need, he or she just presses the button near him or her, his or her desk number will be displayed with music or vibration. APE9500(Left-Wireless receiver): Us Frequency Range: 433MHZ With Pager Quantity: 999PCS Specifications: 240*240*35mm Receiver Sensitivity: -108dbm Power Supply: AC220V/50HZ-12V/1A The Simultaneous Display Of Number: 1PC Letters Show: A.B.C.D.E.F.H.P(80 in English) APE560(Right-Transmitter/Bell/Pager): Call output: 20db UV/m Us Frequency Range: 433MHZ Frequency deviation: 0.5 Mhz Specifications: 60*60*30mm Call distance: 1500 M (open distance) Power Supply: Alkaline Battery 12V 33mA package include Wireless receiver x 1 Transmitter x 20