Description:Fast heating, energy savingPerfect use for women or manPower supplied by power bankCarbon fiber heating, good insulation3-Stall adjustable temperature controlIntelligent automatic constant temperatureKeep your back, waist, stomach and belly warm in this winterMachine washable / water washable, please do not wring out by handSpecification:Material: Twill + electronic componentsColor: BlackSize: S, LVoltage: DC 5VPlug: USB interfacePackage Included:1 X Pcs Heating Vest(the power bank not included)