POWERS KLEIN TOOLS' COOLING FAN and small USB-C devices, headlamps, phones and more EASILY ATTACHES TO KLEIN HARD HATS and safety helmets with accessory mounts BATTERY CAPACITY is 3200 mAh; up to 10W of total power 2 USB-C INPUT/OUTPUT PORTS simultaneously power or charge 2 USB devices RUGGED DESIGN with 6.6-Foot drop protection and IP54 rating LED INDICATORS display 4-segment battery status INCLUDES CHARGING CABLE USB-C to USB-A