Wireless Calling system advantages:Save labour cost,Improve service image,Most important, improve efficiencyHow we use the wireless calling system:First, the calling buttons are pasted or put or on the table, when the guest have any service, he or she press the calling buttons, the receiver (LED screen or watch pager) will get signal with vibration or sound, showing the table number, then the waiter will know which table to be served.Multiple Language watch receiver:Russian, English, Ukrainian, Spanish, German, French, Italian, or we could customize your language as your requiement.3 Prompts MODES:Vibration, beep, light flash; you can set freely.Wireless Call Button Transmitter Specification:Call button frequency:433MHzModulation mode:ASK (AM)Decoding:learning codeWorking current:17mAEmission Distance:100m (open area)Watch Receiver Pager Specification:Capacity: 500 pcs of pager transmittersAlert Mode: vibration,beep and ringSensitivity:-110dBmFrequency:433.92MHzCapacity:500 pcs of pager transmittersAlert Mode:vibration,ring or flashReceive Sensitivity:-110dbmpower supply mode:250mAh lithium batteryStandby Time: (in ideal conditions)Frequency:433.92MHZCompatible with 1, 2, 3, 4, 5 buttonsUpgrade the function, key value assignmentlonger standby timeNote: Due to different production batches, there may be slight differences in products.Specifications: A: blue buttonColour:Photo ColorMaterial:ABSPackage Contents:1 x watch receiver5 x call buttonsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.