1. Support any USB ports of PCs ebooks.
2. Plug&play, ON/OFF switch.
3. Powered by any USB ports or 3 x AAA batteries.
4. Supply strong wind, low noize with soft 4pcs EVA fan blades.
5. Color available: red/ blue/ silver.
1. Power supply: 5V DC/ USB or 3pcs AAA batteries. 2. Operating temperature: -10 to 70. 3. Operating humidity: 85%. 4. Storage temperature: -10 to 80. 5. Storage humidity: 95%. 6. Item demension: 15 x 8.2 x 16CM. 7. Item net weight: 146G. 8. Length of power cable : 1.5M.