It is important to maintain body heat and blood flow in cold weather. The electric heating vest will keep your body warm even on the coldest days

• This heated vest is made of 100% polyester. Water-resistant coated fabric and high collar design for good windproof. skin-friendly fabric and breathability keep you comfortable during exercise. The lightweight heated vest has a thermal protection module, If the wires short out or get disconnected in any way, the power supply simply cuts out, don't worry about security.
• 11 carbon fiber heating elements generate heat across the collar, shoulder, back, waist, and abdomen. Three heated levels(Red high, White medium, Blue low). Two control buttons are zoned control, one button can control the heating zone of the back, shoulders, neck, and waist, and the other button can control the heating zone of the abdomen. You can choose the heating temperature and zone according to the weather temperature and body feeling.
• Heated Jacket Powered by any 5V portable charger, USB, and DC plug(inner the left pocket) compatible with the most portable chargers in the market. ( NOTE: Battery Pack Not Included). The electric heated vest is capable of retaining warmth up to 8 hours at Low Level, 6 hours at Medium Level, and 4 hours at High Level.
• Lightweight heated vest which can promote blood circulation and relieve stiff muscle caused by cold winter and the pain of shoulder, neck, waist, and back caused by daily work. This heated vest is perfect for hiking, biking, skiing, hunting, camping, daily wear, or working outside in cold weather.
• The electric heated vest can be machine-washed or hand-washed. It is recommended to wash it by hand with mild detergent to extend its life. Naturally dry and do not wring or dehydrate, do not expose to the sun. Please take off the power and take out the battery before washing. 

Instructions:

(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 45 degrees Celsius, comfortable gear temperature of 35
degrees Celsius, energy-saving gear temperature of 25 degrees Celsius.

(6). Press and hold the chest temperature
control switch for 3 seconds, and turn off the light to stop heating. How to
Clean the Heating Vests： Machine wash & hand wash are available. Do not wring or twists.
Unplug the powers before washing and make sure it is dried before heating.

*( NOTE: Battery Pack Not Included).