1. Encrypted grid design, safety protection, prevent injury 2. Support 280-degree rotation, you can adjust the direction freely 3. Low noise operation, do not disturb sleep 4. Using aerodynamic principles to accelerate indoor air flow 5. Two gears of wind speed, you can adjust freely 6. Material: ABS, electronic components 7. Operation mode: mechanical 8. Speed gear position: second gear 9. Product size: 24.8 x 26.05 x 18.3 cm 10. Weight: Direct plug-in type: 1.3 kg, USB type: 0.9 kg (including packaging) 11. Power source: Direct plug-in type: plug in-line to connect to the power supply (CN Plug), USB type: USB to connect to the power supply