1. Find the right place and press it to install. 2. Wire into USB port. 3. Press the power switch to adjust the wind power level. 4. Input: DC5V 1A 5. Rated power: <=5W 6. Speed level: 3Specification: Package Weight One Package Weight 0.26kgs / 0.57lb One Package Size 16cm * 12cm * 7cm / 6.3inch * 4.72inch * 2.76inch Qty per Carton 50 Carton Weight 13.25kgs / 29.21lb Carton Size 48cm * 42cm * 38cm / 18.9inch * 16.54inch * 14.96inch Loading Container 20GP: 348 cartons * 50 pcs = 17400 pcs40HQ: 808 cartons * 50 pcs = 40400 pcs