Jetson Junior Girls' E-Bike, Pink with Hearts - Chilcdren's Bicycle - Seat height is 13.4" - 100 percent fully electric; no gas required - 100 percent eco-friendly and green; no pollution The Jetson Junior E-Bike is 100 percent fully electric, so no gas is required. Charge the removable battery in a standard wall outlet. The Jetson Junior offers speeds of 6 or 12 mph max  10 miles per charge. 100 percent fully electric; no gas required 100 percent eco-friendly and green; no pollution