Fashion watch design,Wireless technology,Millions of groups learn to code,Low voltage indication.Builttoin removable, rechargeable lithium battery,Intelligent code, easy to use and simpleSuitable for the elderly, the disabled, hospitals, nursing homes, restaurants, kitchens, factories and other call services..This series of products are widely used in restaurants, bars, teahouses, hospitals, nursing homes, beauty salons, factories, hotels, residential offices and other service places.The product features excellent, rechargeable battery power, long standby time, with perfect charge and discharge protection circuitWith automatic.detection of battery capacity function. When receiving the wireless call signal,the machine will send out vibration, buzzer, and flash.Tips The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect UseColourPhoto ColorMaterialABSPackage Contents1x Wireless Pager4x ReceiverOnly 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 1to3cm.