Condition: 100% Brand NewItem Type: Heating VestMaterial: Chemical fiber blendColor: Black Optional Size: M, L, XL, XXL, XXXL Features:USB heating.Can be cleaned manually or by machine.Power supply: mobile power supply, please take out the mobile power supply when cleaning, the mobile power supply should be supplied by yourself.Slim, soft, light and breathable.For men and women.Mobile power supply is not included.Description:1. Unplug the USB plug.2. Access to mobile charging power supply.3. Hold the chest temperature control output switch for 3 seconds.4. Press the chest temperature control switch for 3 seconds to begin preheating, then adjust the heat to a moderate temperature when a portable power supply is needed.5. Size:Size ShouderBust Length M35cm / 13.8in92cm / 36.2in58cm / 22.8inL37cm / 14.6in96cm / 37.8in60cm / 23.6inXL39cm / 15.4in104cm / 40.9in62cm / 24.4inXXL41cm / 16.1in108cm / 42.5in64cm / 25.2inXXXL43cm / 16.9in112cm / 44.1in66cm / 26inError1cm2cm1cm6. Manually adjust to third gear, warm gear temperature is 45 degrees Celsius, comfortable gear temperature is 35 degrees Celsius, energy saving gear temperature is 25 degrees Celsius.7. Hold down the chest temperature control switch for three seconds, then turn off the lights to stop the heating.