Features: 1. This Phone Radiator Can Cool Down Quickly With High Speed And Low Sound Cooling Rate. It Can Help Reduce The Loss Of Your Phone'S Battery And Extend The Battery 2. This Phone Fan Provides Good Cooling For The Phone While Playing Games, Watching Videos, Or Streaming Live. 3. Built-In 300 Mah Battery, Long Battery Life, Can Continuously Dissipate Heat For At Least 2 Hours When Going Out. 4. The Phone Cooler Is Designed To Be Very Small And Does Not Hinder Your Fingers, Allowing You To Easily Use Your Entire Smartphone. 5. Our Phone Cooler Has Adjustable Grippers That You Can Attach To Almost Any Phone Type. Because It Is Completely Wireless, No Special Connection Is Required. In Fact, After Opening The Stand, Clip It To The Back Of The Phone And Turn On The Switch. Description: 1.Size: 8 x 4.5 x 2.8cm 2.Battery Capacity: 300 MAH (Built-In) 3.Can Be Used Continuously: About 2.8-3 Hours 4.Input Voltage: DC 5V 5.Input Current: 1A-2A Material: PC colour: Electroplated black Package Contents: 1 x Mobile Phone Cooling Fan Radiator 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.