Upgrade DeviceThe back stretcher has 108 massage points, which relieve stress by stimulating the back, help the spine return to its natural line, stabilize the spine, and improve the flexibility of the back and shoulder muscles. Adjustable Back Craker This back pain relief products is ergonomically designed with 3 adjustable height settings. Meeting the needs of users of different ages and health levels, it can safely support their back, help them relieve back pain and correct posture. Durable MaterialThe lower back pain relief is made of tough and environmentally friendly ABS material, which can support up to 300 poundswithout deforming or breaking easily. The foam pad in the middle of the device can play a cushioning effect, making us feel comfortable during use. Lightweight and ConvenientThe back cracker board is light and compact, and is easy to carry around. It is very suitable for multiple scenes such as home, gym, car, office chair, or yoga mat. Economical Spine boardWithout connecting the power supply or device battery, you can enjoy enough massage with your own body weight pressure.For beginners or people with lumbar pain, it is recommended to add a soft cloth pad or towel when using the back popper to avoid direct contact with the hard waist board and cause injury.