Fashion watch design, wireless technology, built-in removable rechargeable lithium battery, low voltage indication, intelligent code, easy to use and simple. Suitable for the elderly, disabled, hospitals, nursing homes, restaurants, kitchens, factories, and other calling applications. This series is widely used in restaurants, bars, teahouses, hospitals, nursing homes, beauty salons, factories, hotels, residential offices, and other service locations. Features include excellent rechargeable battery performance, long standby time, and a complete charge and discharge protection circuit. Automatically detects battery capacity. When receiving a wireless call signal, the device provides vibration, buzzer, and flashing alerts. Note: Product may be updated across different batches, resulting in slight variations or color differences from the image, which do not affect functionality. Color: As shown in photo. Material: ABS. Package Contents: 1 x Wireless Pager, 4 x Receiver. Content limited to items listed above; other products not included. Note: Lighting reflections and different display screens may cause slight color differences between the image and the actual item. Measurement error allowance: +/- 1-3 cm.