New 2021 hit i126621 ultra-low power consumption chip with 1.69 full screen, all dynamic watch faces, brand new menu design, 15 cool watch faces built-in, true heart rate data, painstakingly crafted rotating button to switch watch faces, IP67 level waterproof, Bluetooth calling, Bluetooth music, heart rate detection, component functions, 3D animation watch faces, 23 languages, smooth dragging effect, artificial intelligence split-screen function, the latest stable Wearfit pro App, more than 100 watch faces and bands to choose from, long-lasting battery life upgraded to 65 days, exquisite craftsmanship, the most fashionable appearance, the most cost-effective