Magnetic hot-swap, the product is designed with a magnetic connection to the battery pack, making it easier and faster to replace the battery pack and extending battery life Improve battery life, this product comes with 1 BOBOVR B2 battery pack, each B2 battery pack can extend battery life by an additional 3 hours Suspended design style, through the dark gray design of the dock part, is hidden in the shadow of other dark gray parts of the product, only the white B2 battery pack can be seen visually. This makes its design language look cleaner Upgraded to a battery strap, the B2 battery dock is an extension component specially designed for BOBOVR PLUS series straps. A full set of installation and upgrades can be performed through the expansion port reserved for the strap, and the standard strap will be upgraded to a BOBOVR plus series battery strap Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.