Make sure this fitsby entering your model number. CORDLESS INFRARED HEATING: It’s proven scientifically to be more effective and safer than conventional heating therapy since it penetrates deeper into the skin without causing skin injury. The heated lumbar support built-in 1800mAh rechargeable battery, you can use it anytime anywhere without the limitations of the power cord, it can be used continuously for about 60-90 minutes when full charge. PAIN RELIEF: Give you immediate & lasting relief from a herniated disc, sciatica, stiffness, back pain, sore muscles, and other back discomfort. STRETCH & SUPPORT YOUR LUMBAR: The waist belt anchors under the rib cage (providing stable support) and lifts the torso gently, while pushing downward against the hip bone during the inflation process. This action gently stretches the torso vertically and displaces stress away from the affected disc and nerve. CONVENIENT CONTROLLER: There are 3 heating setting(low, mid, high) and 3 timing(10min, 20min,30min) for your selection. When you need fast heating, select the high heating, When you are using it and want it to remain a certain temperature, select a low heating and 30 minutes timing. SAFE AND COMFORTABLE: The heating material is made from carbon fiber, which is safer, softer and more healthy than original heating method. With the extension pad, the belt can support up to 49 inches waist. NOTE: Please measure the waist size on the abdomen.