This small fan FITS FOR ANDROID CELLPHONES WITH TYPE-C PORT ! Don't need battery, don't need to charge. Just plug and use! Very convenient and useful for fast cooling in hot summer. Great as a gift for friends and families. 100% SATISFACTION GUARANTEE - Unconditional Money back and replacement guarantee. Your satisfaction is our goal and motivation! Specifications: Voltage: 3.7V-5 V Current: 0.3A The motor speed: Can reach 16000 RPM Material: TPE Size: 3.3 x 1.6 inch Weight: 0.55 ounces/pcs Package includes: 4 x Cell Phone Fans Notice: The Android mobile phones need to support OTG function to use. Generally, most cell phones are defaulted to open the OTG function. If not, please search the term “OTG” in your settings and enable it. If you have any issues, please feel free to contact us.