Three levels of wind speed optional for you to meet your different needs. Mute operation causes no-disturbance for your voice call or gaming, which is convenient for using. With mini and compact design, it is comfortable to grip and easy to carry anywhere and anytime. Made of premium ABS material, it is durable and reliable in your daily use. The length of the product is 10.5cm, the width is 6cm, the height is 3.5cm. It has a wide compatibility and it is suitable for phones within the width of 66-89mm. 400mAh battery can support the fan to work for 5 hours. Item Name: Phone Radiator Material: ABS Model: SRQ Color: Black/White Optional Type: Plug-in/Rechargeable Optional Noise: 24 Decibels Plug-in Type Power Supply: USB Rechargeable Type Power Supply: Battery Rechargeable Type Battery: Built-in 400mAh Rechargeable Battery(Included) Battery Standby Time: 5H Wind Speed: Three Levels Optional Compatible Devices: Phones within the Width of 66-89mm Features: Super Silent, Portable, High Efficiency Size Details: 10.5cm x 6cm x 3.5cm/4.13" x 2.36" x 1.38" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. There are two types (rechargeable/plug-in) for you to choose from and the battery is not included in the plug-in type. Package Includes: 1 x Phone Radiator (Phone Not Included) 1 x USB Charging Cable