68 mAh A300 Waterproof Fitness Tracker Pink/Black

Accuracy : better than ± 0.5 Seconds per day at 77°f (25°c); connectivity: bluetooth le; battery type: lithium polymer; battery capacity: 68 mah; battery life: up to 4 weeks; battery cycle life: >300 full discharge cycles; memory: up to 60 days (with daily activity tracking and 1 hour of daily training); water resistance : 98' (30 m); backlight: yes; operating temperature: 14 to 122°f (-10 to 50°c); charging temperature : above 32°f (0°c);materials device: acrylonitrile butadiene styrene, glass fiber, polycarbonate, stainless steel,polymethylmethacrylate; strap: silicone, stainless steel; thickness: 0.5" (12.7 Mm)