Portable Air Conditioner Bladeless Cooling Neck Fan Digital Display Adjustable Summer Outdoor Hanging Air CoolerFeature:1. Semiconductor refrigeration, rapid cooling2. Three-speed wind speed/three-speed cooling mode, can work independently3. Hidden fan blade design, safe to use4. Brushless motor, quiet and efficient5. Large-capacity battery, long-lasting battery life6. Soft and comfortable silicone rope, worry-free wearing7. High-definition digital display, can display power, cooling temperature, wind speed gear8. High-precision temperature detection, safe temperature controlSpecification:Name: cooling fanBattery capacity: 2000mAhMaterial: ABS+Silicone+Aluminum alloyProduct size: host 95x118x40mm/3.74x4.65x1.57in, hanging neck line length is about 345mm/13.58inProduct net weight: 246.5g/317gProduct packaging: color boxColor box size: 195x155x47mm/7.68x6.1x1.85inProduct color: white, blueWorking voltage: DC5V 1AInput power: 5WGear adjustment: three-speed wind speed, three-speed coolingBattery type: Lithium battery (18650)Operation definition: Fan power key: low, medium and high three-speed, cooling key: 20/15/10°CCharging time: about 4 hoursOperating hours: Fan 1st gear: about 6.5 hoursFan 2rd gear: about 3.5 hoursFan 3rd gear: about 2.5 hoursRefrigeration 20°C: about 3.5 hoursRefrigeration 15°C: about 2.5 hoursRefrigeration 10°C: about 1.5 hoursFan and cooling are turned on at the same time: about 3.5 hours for 1st gear, about 2.5 hours for 2rd gear, and about 1.5 hours for 3rd g