Fan blade: no blade design Product material: ABS environmental protection raw material Product size: about length 197*198*60MM Wind speed: three gears adjustable, one gear breeze, two gears natural wind, three gears strong wind Output power: 4.5W Input current: DC0.5A/1A Output voltage: DC5V-9V Input voltage: DC5V Power supply mode: battery storage (a lithium battery), USB power supply (pluggable computer USB port), power bank power supply Air supply method: do not turn pages, do not shake your head Wind speed gear: three gears Operation: Mechanical Whether to support charging: support Speed gear: third gear