Specification:Name: Unisex Winter USB Intelligent Temperature Control Electric Heating Sleeveless VestMaterial:PolyesterPower Supply Interface: USBPower Supply: 5V/2A Mobile Power (Not Included)Features: Intelligent Three-speed Temperature Control Adjustable, Dual Control SwitchAge Of Application: Adults Men and WomenTemperature: 60-65(Red), 45-50(White), 40-45(Blue)Applicable ambient temperature: -30 to 14 DegreeColor: Grey, RedSize:S/M/L/XL/2XL/3XLFeatures:With mobile power storge pocket, easy travel.3s fast heat,dispel cold and keep you warm.Suitable for indoor and outdoor temperatures.A button to heating, three stall temperature control, intelligent heating.Easy to clean, wash directly.Note: Please take out the charging treasure before washing, put the USB interface back into the pocket and pull the zipper. Please ensure thorough drying to use it again.General USB interface power supply, longer service life,anti water splashing and washable.Built-in heating plate, clean and wash, no need to disassemble4 large area heating body, far infrared heat application, the maximum temperature can reach 65 degrees Celsius, safe without radiationInstructions:1. Remove the USB plug2. Connect to mobile charging power3. Press the chest temperature control output switch4. Press and hold the chest temperature control switch for 3s,start to warm up and then adjust to the medium temperature heat.5. Manual adjustment to third gear,60-65(Red), 45-50(White), 40-45(Blue)6. Press and hold the chest temperature control switch for 3 seconds, turn off the light to stop heating.Washing instructions:1.Take out removable charger.2.Neutral detergent is available and then hand wash.3.Do not force knead or beat.4.After nature air drying can be use.Note:Do not use the wet clothes. If the clothes are wet, please turn off the power and stop using.This product does not include mobile power, you need to always connect to the mobile power when using.The fabric is elastic, and the size will be little small than normal.If you like loose. Please buy the big one size!Please allow a slight error due to manual measurements, thank you!Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.Package Included:1 x Sleeveless Vest(Mobile Power Not Included