User's Guidance:1. Long press the switch button for 1-2 seconds to start working.2. The red light is on, the work is the high temperature gear, and it will automatically jump to the second gear in 5 minutes without manual intervention3. The white light is displayed, the work is in the middle temperature range, and then manually tap the switch to adjust to the low temperature range.4. Display the blue light, press again to adjust to the high temperature gear Temperature Class:High temperature: 40°C(red)Medium temperature: 35°C(white)Low temperature: 30°C(blue) Specification: Color: blackMaterial: polyesterFeatures: temperature adjustableHeated Areas: 1 neckWorking Time: depends on the temperature settings, and mobile power capacityPackage list: 1 * heated jacket (not include power supply bank)Washing:1. Do not use high-temperature water or materials with strong acid or alkali to clean, and do not use it before it is completely dry2. Hand wash or machine wash in a laundry bag, do not twist or wring, hang dry only. Battery can not be wash, please pull out the battery before washing.