This hoverboard doesn't have any unlockable upgrades.
Eagle is the forty-sixth limited hoverboard in Subway Surfers, and a limited hoverboard released with Subway Surfers World Tour: Washington D.C.. Like any other hoverboard, it protects you from crashing for 30 seconds. When crashed, the hoverboard will explode and recharge for a few seconds before you can use it again. It has the shape and appearance of an eagle, which is America's symbol. It costs 50,000, like most of others limited hoverboards.