• 【Built-in Rechargeable Battery】HONGJING heated back brace is equipped with a 5000mAh rechargeable battery that lasts up to 4-5 hours (low mode) when fully charged. Lightweight and compact battery, easy to carry without burden, can be used during daily activities such as walking, running, gardening, doing housework or just sitting.
• 【3 Heating Levels】HONGJING heating back brace has 3 temperature options (low, mid and high), help promote blood circulation and relieve back pain effectively. You can set the temperature freely according to your needs.
• 【Perfect Fit】Ergonomic design fits the curve of the lumbar spine and the upgraded durable velcro design with adjustable compression level provides strong protective support for the lower back. The 3 springs and 4 steel bars are designed to keep your back stable and prevent back injuries from weight lifting, long time standing or sitting, doing housework and working.
• 【3 Sizes】This back support belt has 3 sizes (M, L, XL). M fits circumference around navel 33-41 inch. L fits 41-49 inch. XL fits 49-59 inch. You can choose the size that best fits your waistline. Pay attention to measure your waist at the level of your navel, not your pants' size.
• 【Breathable Fabric Design】Our high-quality fabric will also withstand washing and will not lose its function over the course of time unlike many other products. The flexible mesh design, comfortable and breathable.

• Package Dimensions ‏ : ‎ 10.75 x 8.39 x 2.76 inches; 15.87 ounces
• Batteries ‏ : ‎ 1 Lithium Polymer batteries required. (included)
• Date First Available ‏ : ‎ July 24, 2023
• Manufacturer ‏ : ‎ HONGJING
• Country of Origin ‏ : ‎ China