The dual-core is twice as cool as the air conditioner, and it really quickly removes heat and cools off, solving the hot and dry weather in summer. For outdoor sports, you can wear it with a lanyard, the length can be adjusted as you like, and the 165g will not strangle your neck at all. Upgraded leafless is and more worry-free Leafless with air inlet, safe and does not hurt hands, does not curl hair Built-in 2000mAh battery, accompany you from morning to night, online all day. Use in multiple scenes, refreshing and unrestrained, anytime, anywhere, enjoy cool and refreshing Product name:hanging neck cooling fan Product model:F-S13 Input voltage:DC5V=2A Charging capacity:800mA Battery capacity:2000mAh Working current: 210mA/1W second gear 400mA/2W third gear 700mA/3W cooling 1000mA/5W Use time: = about 90 minutes of cooling second gear = about 80 minutes of cooling third gear = about 70 minutes of cooling Product features:Dual-use handheld + hanging neck, front cooling sheet, ice cooling, top side air outlet, small size Colour:A:Black Material:ABS+electronic components Size:20x75x37.5mm Package Contents: 1 * Cooling Neck Fan 1 * Charging Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.