Description: 2 in 1 heating and cooling: the electric scarf with temperature control technology provides heating and cooling mode, suitable for year-round use. The heating mode can adjust the temperature of the scarf between 40 and 50 , and the cooling mode can opeate at 15 to 25 lower than the ambient temperature. Flexible size: the size around the neck can be adjusted by knob to meet various needs. Made of ABS shell and aluminum alloy radiator plate, it is light and durable, and has no burden on your neck. Using IC intelligent chip. When an over-current is generated, the power is automatically cut off and restarted to prevent failure. After the scarf cools, you can use it again. Specification: Working voltage: DC5V/1.5A Executive standard GB4706.1-2005 The maximum power: 4.8W Charging Time: 2 hours Charging instructions: charging red light, full off, blue light on Charging interface: Type-C Battery: 2600mAh polymer Working Time: 2.5 hours Refrigeration first gear 15C, second gear, 20C, third gear, 25C Control method: Button Heating first gear 40,second gear 45, third level 50 Material: ABS+PP+ electronic components Size: Approx.170 x 40 x 147mm/6.7 x 1.6 x 5.8 inch Package Includes: 1x Neck Fan 1x Power Cord 1x Manual