Features * NO BATTERY VERSION (A10) Please choose battery 5000mAH or ZMI 5000mAh, battery bag size: 125mm x 68mm * SKIN-FRIENDLY, HELP TO RELIVE WAIST PAIN or STRAIN: When the waist is sore, use it around the waist, you tie feel warm, very comfortable. * LOSE WEIGHT TO SOME EXTENT: Graphene heating module warm to help the body FAT to loss weight, have a better figure. * WAIST WRAP DESIGN: Adjustable wraparound waist brace with widely stick straps (instead of a single pad) on a neoprene base and it\'s comfortable and easy to wear. Especially you could wrap it as Back / The lower abdomen / Stomach support and heat to the certain area if possible. * 5-10s HEATS UP MORE QUICKLY: Yosoo knee heating pad reach up to around 40-58℃(under 5V adapter input). * 3 HEAT LEVELS FOR YOUR SELECTION: Widely temperature range from 40-58℃; Click the power button to switch to 3 different gears. * HAND WASHABLE (NOT FOR WASH MACHINE) Easy to clean, tough, durable.