Features: Fan is made of high-quality TPE material, which is environmentally friendly,tasteless. Small and compact for convenient portability in your pocket or handbag to carry; Ultra-quiet mini fan, enjoy cooling away from noise; This fans can only use mobile phones with OTG function! The power bank can'for t be used! Some mobile phones have OTG function, but it needs to be turned on in the settings, and it can be used after turning on the OTG switch, or depending on the situation! Specifications: Material:ABS Size:Approx.38x46x15mm/1.49x1.81x0.59in Color:White,Pink,Red,Green,Blue,Black,Orange;(Optional) Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Mini Phone Fan