The SereneLife Home/Office Exercise Bike - Under Desk Bicycle Pedaling Fitness Machine - Exercise Bike: Body Sculpting & Fat-Burning Made Easy - Low-Profile Design Can be Placed Under Desks or Work Stations - Targets Stomach, Abs, Glutes, Buttocks, Hips, Waist, Thighs & More - Hands-Free, Non-Interfering Ultra Quiet Operation - Compact, Space-Saving Design - Comfortable Backrest & Seat Cushion for Prolonged Use - Adjustable Resistance for Pedal Intensity Control - Convenient Height Adjustable Seat for All Body Types - Healthy Fitness Fun for Ages 14+ and Up - Used in Homes, Offices & Work Environments - Technical Specs: - Flywheel: 8.8 lbs. (4 kg.) - Construction Material: Reinforced Steel - Max. Weight Capacity: 242 lbs. (110 kg.) - Adjustable Seat Height from Floor: 30-38’’ (762-965mm) - *Some Assembly Required.