Features. 110,000 RPM unparalleled powerful airflow Ultra quiet, high performance brushless motor Energy saving design, cost saving 13 fan blades for maximum efficiency and durability Advantages: 1. this turbo fan has a simple design, reasonable structure, powerful performance, air speed over 45m/S 2. 28.8mm diameter low-voltage brushless high-speed motor, 8.4V working voltage. Quiet and strong wind power 3. Built-in 13 large-size blades, made by precision CNC machining. 4. 2 built-in 18650 power batteries (the capacity of a single battery is 2500MaH), long-lasting (the most high-grade up to about 15 minutes of continuous use) 5. 30A ESC, low heat generation; 150W maximum power, strong performance. 6. using type-c interface, support PD fast charging agreement 7. support infinitely adjustable speed function, can adjust any wind speed, press and hold to start, release the button to stop 8. Better practicality, more extensive use of the scene 9. Pocket fan, mini size, easy to carry Special Notice. 1. fan power, long time running attention to heat, the body temperature rises, pay attention to rest or reduce speed, long time running recommended medium-speed 2. when charging and discharging, please put it in a ventilated place, no combustible materials around, when its wind speed is significantly reduced in time for its charging 3. its shell for 3D printing, handmade DIY and become, there are slight defects is normal. color: Black Material: PETG Package Contents: 1 x Mini Turbo Jet Fan Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.