Upgrade Back StretcherThis chiroboard has 10 magnetic points and 98 massage pressure points, it brings acupuncture effect by deeply pressing specific acupoints. It can promote blood circulation and restore the natural line of the spine. Adjustable DesignThe back craker has three adjustable heights, you can fix the back pain relief products in the most comfortable position. It is ergonomically designed to safely support the back for easy stretching and effective pain relief. Durable MaterialThe back popper is made of ABS material with strong durability. It can support up to 300 pounds without deforming or breaking easily. Lightweight and ConvenientThe back cracking device is lightweight and can be folded flat, which is easy to store and carry. Perfect for use at home, in an office chair, in the gym, in the car or on a yoga mat. Cost SavingYou can enjoy enough massage by pressing your weight without connecting the power supply or device battery.For beginners or people with lumbar pain, it is recommended to add a soft cloth pad or towel when using the lower back pain relief to avoid direct contact with the hard waist board and cause injury. ZYSD hopes you to be satisfied with every purchase.