The powerful cooler achieves excellent radiating effect. Effectively solve the fever of your cell phone when you play games. Built-in 1500mAh lithium-ion battery, lightweight, easy to carry, great for emergency charging, no need to worry about your cellphone power off due to lack of electricity. A compact, ergonomic shape lets you play comfortably for hours. While it keeps your phone cool, it also allows you to connect a USB cable to charge your phone.6.1" L x 3.54" W x 1.37" H