The Dolphin contains so much of our design philosophy: to make it easier for customers to carry. Equipped with comfortable but compact 20" x 4" tires, the Dolphin-MBL can be conveniently folded to store and transport the bike more easily.But don't underestimate its performance: aluminum frame, 500W power motor,12.5AH high-capacity lithium battery, front, and rear mechanical disc brake,M3 smart display, everything you need. It can take on many tasks you would not expect from a portable&folding bike, such as hauls from the grocery store, challenging terrain, and rough roads without breaking a sweat. Explore new roads with ECOTRIC!