Features: Adopted high quality carbon fiber heating material, which is heat-resistance, wear resistance. 3 gears temperature control, red LED for high temperature, blue LED for middle temperature, green LED for low temperature. It heats up fast, only takes one to two minutes for the temperature to come up. Using power bank (not included) for power supply. Small size, light weight and easy to carry. Specification: Condition: 100% Brand New Material: Carbon fiber heating material Color: as picture shown Input: 5V, 2A Power: 8W Size: 26x10cm/10.2x3.9inch Package List: 1 Set Heated Jacket Heating Pad Usage: 1. Take out the USB plug and connect it to the 5V 2A jack of power bank. Turn on the power bank, and press the switch for 3 seconds for starting. 2. Press once the switch to adjust the temperature: red light for high temperature, blue light for medium temperature, green light for low temperature. 3. When heating is off, long press the temperature control switch for 3 seconds and turn off the lamp to stop heating. Note: 1. Take out the power bank, add neutral detergent to wash by hand, do not forcefully knead or beat. Naturally air dry before use. 2. If not used for a long time, please do not access to the power bank. 3. Do not use high temperature water or strong acid detergent. 4. Do not use for wet clothes. Please turn off the power and stop using it after getting wet. 5. The use time depends on the capacity of the power bank. 6. It should not be used by people who are unable to take care of themselves, infants or those who are not sensitive to heat. 7. Do not cut the heating pad with needle, do not use it when there is nobody in room. 8. Do not use it in wet conditions. Please dry it before use.