Tested, and fully functional! The Xiser Aerobic Trainer Portable Step Climber is a vintage stepper exercise machine made of aircraft aluminum, known for its durability and compactness. This hydraulic resistance stepper is designed for weight loss and fat burning, making it ideal for home use. Its sleek silver color and foldaway feature make it a convenient and effective addition to any gym or training routine. The Xiser brand is known for producing high-quality fitness equipment, making this aerobic trainer a reliable choice for those looking to improve their cardiovascular fitness in the comfort of their own home.