Product information: SizeOne size Material: ABS+ memory material Applicable scene: Fitness equipment, sports protective gear accessories, sports trends, health massage Product category: Lumbar massage board [Scope of application] Cervical vertebrae Lumbar vertebrae Legs Foot Hand [Material] Environmental grade ABS material [Material characteristics] 1. Environmentally friendly non-toxic ABS raw materials, resistant to falling, impact resistant, flexible. 2. Strong anti-corrosion ability, no reaction with acid and alkali. Features: 1Effective Point Massage: The back massage stretcher has 10 magnetic points and 96 plastic pins, which can exert acupuncture by deeply pressing specific points. The back massager helps to activate the natural therapeutic response and improve blood circulation, so that you can completely relieve back pain, spine pain, muscle pain, etc. 2Adjustable Stretch: Ergonomic self-massage device. 3 kinds of settings can be fully extended by our ergonomic self-massage device, and you can fix this back stretcher device at the most comfortable level. The back massager stretches easily and relieves pain effectively. Start improving your quality of life. The back stretcher takes only 5 minutes a day! 3Powerful Function: 1) Restore healthy waist curve; 2) Relieve muscle pain in waist and back; 4Correct sitting posture and say goodbye to hunchback. In this way, your body can be better prepared to withstand the pressures of your career or lifestyle. 5Lightweight&Sturdy: The lower back stretcher is made of environmentally friendly ABS and Nbr materials, giving you a harmless and safe experience. This lower back support can withstand a weight of up to 100kgs/220lbs and will not deform easily even when folded. Use it forever! Very suitable for use at home, office chairs, gym, yoga. 6Perfect Gift: This back massager is the best gift for relatives and friends. Note: 3Chinese=3 gears Chinese manual 3English=3 gears English manual 4Chinese=4 gears Chinese manual 4English=4 gears English manual Packing list: 1x Back Massager