Jarv Action HR Wireless Fitness Tracker with HR

Screen: 0.86 “ OLED

Standby time: 7-15 days

Weight: 0.95oz

Battery Type: Rechargeable Li Battery

Battery Capacity: 40mAh

Data Sync: Bluetooth 4.0

Working Temperature: 14°F- 113˚F

Band Length : 9.2" inches

Waterproof: IP65- not for swimming or showering

Actual performance may vary due to the user's habits, different modes of operation, and mobile phone settings.