Front case: Zinc Alloy Caseback: ABS Plastic
45g
42.7x 10.5mm Diameter: ￠42.7mm Band: 20 wide
double HR light
SB1254HO
Black/Silver/Rose/Rose gold
With 1.22" 228x228
With with Blood Oxygen
With 14 Sport Modes,Walking,Running,Treadmill,Hiking,Cycling,Swimming ,Rower,Elliptical,Stair Climber,Skipping,Yoga
Workout,Golf,Badminton
With double HR light
With Front case: Zinc Alloy
Caseback: ABS Plastic
With 200mAh Battery
45 days