■Model:XO-J12 ■Bluetooth pairing name:XO-J12 ■Chip:Jerry 7012A6S BT5.3 ■APP:Da-Fit ■Internal storage Flash:RAM:640KB,ROM:2MB Flash:128M ■Applicable platforms and requirements: Android 4.4 (including) or above, IOS9.0 (including) or above ■ product size: 51.4 * 45.2 * 11.2mm single head weight: 47g strap weight: 20.g case material process: the main body zinc alloy + tempered glass ■Strap: Silicone strap Total length 220MM, adjustable length 145-190MM ■Charging: magnetic charging cable ■ Main screen: 2.06 inches Resolution: IPS 410 * 502 AMOLED screen ■Waterproof rating: IP68 ■Battery capacity: 3.7V/300mAh polymer battery