The Garmin Forerunner 310XT fits snugly into charger to allow for reliable charging without the risk of charger falling out. USB Charging cable allows you to connect charger to a Laptop or Power bank for easy portable charging - Compact and lightweight Design - Convenient for travellers and business users. Cable provides fast and stable charging speeds and protects your watch from over-voltage and over-current damage. What's in the box 1 x charger