Battery: Use a large Seiko 90mAh battery. The dispensing depth is waterproof and the shell material has passed UV. Through the screen IPS LCD, high contrast and wide color gamut provide superior HD picture quality experience The IPS screen has a wide viewing angle and the picture difference is very small when the ‘you look at the screen in all directions, ensuring image fidelity and no color cast. The IP67 waterproof design allows you to wear it without worrying about washing your hands, rain or sweat Real-time dynamic heart rate monitoring The bracelet is skin-friendly and soft, and the body is light and thin, so you can wear it safe to sleep. The bracelet will automatically monitor your sleep, allowing you to see your sleep status at a glance Just use the bracelet, you can quickly change music, let you listen to it at any time, anywhere When you sit for a long time, it will remind you to get up and move through the vibration, and step out to relax your body. Amount of delivery: 1 *