IZIP Trailz Enlightened Men's Medium Plush, Easy Riding Comfort Bike Design with Modern Electric Hybrid Performance 24v10a Lithium-ion Battery Pack with Advanced Battery Management System for High Performance and Light Weight Patented TMM System with Intelligent Power Assist and Hub Motor Real Transportation at Speeds up to 15 mph/ 24 km and Range up to 23-30 Miles / 38 - 48 km with Normal Pedaling (Rider Weight, Rider Input and Terrain Contingent)