Screen size : 1.43 round screen, resolution: 466*466 Screen type : AMOLED screen Bluetooth : Bluetooth 5.3 Strap material : Standard: silicone strap Color : black, gold, pink, blue Operation mode : full touch + 1 button Battery: polymer lithium ion battery Capacity :3.8V/250Mah Usage time : 2 days of heavy use, 5 days of light use, standby: 15 days, call/music playback: 4 hours, Charging method : magnetic charging Charging time : regular 2H