Garmin Vivofit 3 Activity Tracker, Regular Fit-Black Computer Monitor Accessories so no external power supply

so no external power supply is needed to transmit the audio/video signal across the longer distances unique to fiber optic cabling

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Temperature Rating: -25°C to +70°C

The charging process is facilitated by a charging base

Garmin Vivofit 3 Activity Tracker, Regular Fit-Black Computer Monitor Accessories so no external power supplyOperating system android, ios Memory storage capacity 1 MB Special feature Time Display, Sleep Monitor, Activity Tracker, Pedometer Connectivity technology Bluetooth Wireless communication standard Bluetooth Battery cell composition Lithium Metal GPS Built in GPS Shape Round Screen size 1 Inches Brand Garmin Auto Activity detection, capture different activities automatically and view them on Garmin connect online 1 year battery life, no recharging