Wireless Calling system advantages:Save labour cost,Improve service image,Most important, improve efficiency<br> How 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.<br> Multiple Language watch receiver:Russian, English, Ukrainian, Spanish, German, French, Italian, or we could customize your language as your requiement.<br> 3 Prompts MODES:Vibration, beep, light flash; you can set freely.<br> Wireless Call Button Transmitter Specification:Call button frequency:433MHz<br> Modulation mode:ASK (AM)<br> Decoding:learning code<br> Working current:17mA<br> Emission Distance:100m (open area)<br> Watch Receiver Pager Specification:Capacity: 500 pcs of pager transmitters<br> Alert Mode: vibration,beep and ring<br> Sensitivity:-110dBm<br> Frequency:433.92MHz<br> Capacity:500 pcs of pager transmitters<br> Alert Mode:vibration,ring or flash<br> Receive Sensitivity:-110dbm<br> power supply mode:250mAh lithium battery<br> Standby Time: (in ideal conditions)<br> Frequency:433.92MHZ<br> Compatible with 1, 2, 3, 4, 5 buttons<br> Upgrade the function, key value assignment<br> longer standby time<br> Note: Due to different production batches, there may be slight differences in products.<br> Specifications: B: orange button<br> Colour:Photo Color<br> Material:ABS<br> Package Contents:<br> 1 x watch receiver<br> 5 x call buttons<br> Only the above package content, other products are not included.<br> 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.