Fashion watch design,IP6 level waterproof,Wireless technology Millions of groups learn to code,Low voltage indication Built-in removable, rechargeable lithium battery.Intelligent code, easy to use and simple. Suitable for the elderly, the disabled, hospitals, nursing homes,restaurants, kitchens, factories and other call . 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 send out vibration, buzzer, and flash. Different batches, different angles and lighting, there are slight differences between the actual product and the picture, which not affect normal use Colour:Black Material:ABS Package Contents: 1x Wireless Pager 1x Receiver 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.