This product combines high frequency wireless mission technology, digital recognition technology and microcomputer processing technology to realize the remote wireless call function.The system uses millions of learning code chips, with excellent safety performance.Fashion watch designIP6 level waterproofWireless technology Millions of groups learn to codeVibration/buzzer/light flash is optionalLow voltage indicationBuilt-in removable, rechargeable lithium batteryIntelligent code, easy to use and simple. Suitable 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 circuit; With automatic detection of battery capacity function. When receiving the wireless call signal, the machine will send out vibration, buzzer, and flash.Colour:BlackMaterial:ABS Package Contents:1 x Receiver1 x mitter Only 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.