Origin: Mainland China Product color: black Product material: ABS+electronic devices Product style: plug-in model, rechargeable model (optional) Refrigeration principle: fan cooling Gear adjustment: The charging model supports second gear adjustment, while the plug-in model cannot adjust gears.Power supply type: built-in 600mah battery with two adjustable settings Charging time: about 1.5 hours Battery life: 2-4 hours (first gear lasts about 3 hours, second gear lasts about 2.5 hours) Product interface: Type-C Input voltage: 5V-9V Indicator status: red light when charging, green light when fully charged Suitable for mobile phone width: 62~92mm Product size: 86.5*62.3*33mm/3.39x2.44x1.3inch Product net weight: plug-in model 44g, rechargeable model 53g