This hoverboard doesn't have any unlockable upgrades.
Bengal is the sixteenth limited hoverboard in Subway Surfers. Like any other hoverboard, it protects the player from crashing for 30 seconds. When crashed, the hoverboard will need a few seconds to recharge before it can be used again. It was also the first limited hoverboard of 2014 and the special for the Mumbai Edition. This hoverboard has no special powers.