Press pager(APE700), then the wireless receiver(APE9300) 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. Wireless paging system is widely used in service area. It consist of table button for guest use and signal receiver for waiter or waitress use. When the guest needs any service, he or she just press the button near him or her, his or her desk number will showing on the display with alert music or sound. So the waiters could offer service very timely. APE9300(Wireless receiver): Us Frequency Range: 433MHZ With Pager Quantity: 180PCS Specifications: 240*240*35mm Receiver Sensitivity: -108dbm Power Supply: AC220V/50HZ-DC12V/1A The Simultaneous Display Of Number: 3PCS Letters Show: A.B.C.D.E.F.H.P(80 in English) APE700(Transmitter/Bell/Pager): Call output: 20db UV/m Us Frequency Range: 433MHZ Frequency deviation: 0.5 Mhz Specifications: 120*120*196mm Call distance: 1500 M (open distance) Power Supply: Alkaline Battery 12V 33mA package include Wireless receiver x 1 Transmitter x 20