Specification Voltage5V DCColorBlack Grey NavyMaterialPolyester Carbon fiberTemperature levelBlue light 30℃White light 40℃Red light 50℃GenderFor Men SizeM L XL 2XL 3XL 4XL 5XLPhysiotherapy place Abdomen Back 3 heating zone Size Chat SizeLength cm Bust cm Shoulder width cm Sleeves length cm M70 510946 561L72 51134863 5XL74 511749 5652XL76 51215166 53XL78 512552 5684XL80 51295469 55XL82 513355 571Features 1 Heat everywhere back both sides of the abdomen total 3 zone heat 2 Black technology waterproof and oil proof 3 Soft and breathable not easy deformation adjustable three temperature levels 4 Quick heating energy saving long service time 54 Activates various functions of skin and promotes metabolism 6 Help to warm the human body consumes excess heat increases blood oxygen and fluidity 7 Provides deeper adjustment of physiological functions to avoid sub health state and restore the vitality 9 Improves body s microcirculation activate the meridians eliminate partial pain and inflammation How to use 1 Take out the USB plug 2 Access to the mobile charging power source 3 Press and hold the chest temperature control output switch for 3 seconds 4 Long press the chest temperature control switch for 3 seconds start to warm up and then adjust to the medium temperature heat when you need to always connect the mobile power 5 Manual adjustment to the third gear warm temperature of 50 degrees Celsius comfortable gear temperature of 40 d