Features: 1. [TFC Refrigeration] TFC compression refrigeration system, built-in multiple TEC refrigeration unit. 3 seconds whole body cooling, body feeling straight down 15 degrees beyond the air conditioning cold air. 2. [Mobile Power] The third generation of high capacitance battery core, small energy consumption, long life, can be used as a rechargeable treasure. 3. [Aviation Noise Reduction] The second generation of active noise reduction brushless motor, 20dB silent noise reduction, five gears are also quiet. 4. [AI Energy Saving Chip] Intelligent and precise temperature control, energy saving and power saving, enjoy the long-lasting cold wind. 5. [LED Display] Cooling display, wind power level display, charging display. 6. [Use Scene] The fan can be handheld, standing, hanging neck can be hiking, traveling, office, home, outdoor travel and other scenarios. Specifications: Battery voltage: 3.7V Battery capacity: 4000mAh Fan speed: 5 speeds Product weight: net weight 193g / gross weight 245g Product list: Fan* 1 Lanyard* 1 Instruction manual* 1 Charging cable* 1Features: 1. [TFC Refrigeration] TFC compression refrigeration system, built-in multiple TEC refrigeration unit. 3 seconds whole body cooling, body feeling straight down 15 degrees beyond the air conditioning cold air. 2. [Mobile Power] The third generation of high capacitance battery core, small energy consumption, long life, can be used as a rechargeable treasure. 3. [Aviation Noise Reduction] The second generation of active noise reduction brushless motor, 20dB silent noise reduction, five gears are also quiet. 4. [AI Energy Saving Chip] Intelligent and precise temperature control, energy saving and power saving, enjoy the long-lasting cold wind. 5. [LED Display] Cooling display, wind power level display, charging display. 6. [Use Scene] The fan can be handheld, standing, hanging neck can be hiking, traveling, office, home, outdoor travel and other scenarios. Specifications: Battery voltage: 3.7V Battery capacity: 4000mAh Fan speed: 5 speeds Product weight: net weight 193g / gross weight 245g Product list: Fan* 1 Lanyard* 1 Instruction manual* 1 Charging cable* 1