KICA Jet Fan 2S - Black Features: Turbo Boost Technology: Activate with a single button to instantly ramp up to 117,000 RPM, delivering a powerful wind speed of 27.5 m/s, ideal for high-performance tasks. Stepless Speed Adjustment: Easily control wind speed with a smooth sliding mechanism for precise customization. Portable and Lightweight: Designed for easy travel and outdoor activities. Premium Build: Durable and stylish aviation-grade aluminium shell ensures long-lasting performance. Versatile Functionality: Perfect for cleaning, drying, inflating, and reaching dust in hard-to-access areas. 3.5H Runtime, TYPE-C Fast Charging General Name: KiCA JetFan Mini Air Duster Dimensions: 31.7×49.1×107.6mm (smaller than iPhone 13 mini) Weight: 137g/0.3lb Material of Main Body: Aluminum Alloy Performance Revolution Speed (RPM): Lowest Gear: 12,000 Highest Gear: 36,000 Wind Speed (m/s): Lowest Gear: 3.4 Highest Gear: 9.0 Noise (dB): Lowest Gear: 37.3 Highest Gear: 67.7 Thrust (g): Lowest Gear: 3.2 Highest Gear: 24 Battery Charging Time: About 2.4h (charge it via Type-C port, DC 5V/2A) Battery: 3.7V, 3000mAH, 11.1Wh (built-in battery cannot be removed) Operating Voltage Range: 3.4V4.2V Charging Temperature Range: 0°C+40°C Max. Runtime: About 14h (under the low speed)