Features: Provides 4.2V for DC from USB,Power devices from a USB to 5.5x2.5mm port. By powerbank to power other devices. Such as: USB lights, USB fan, radiator, mini speakers, and so on . With indicator light, red light when charging, green light when fully charged. The size of the for DC Connector is OD: 5.5 mm and ID: 2.5 mm. Please check if it fits in the power jack on your devices. Safe and Reliable, with built-in upgraded intelligent IC circuit, our voltage adapter provides your devices perfect protecetion from over-current, over voltage, overload or short circuit. Package Includes: 1x USB to for DC Power Cable Specifications: Material:Plastic Input: 5V 2A Output: 4.2V 1A Length:Approx.97cm/38.19in Net Weight:28g note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.