1PC interchangeable USB A male to for plug connector 5.5 x 2.1 mm. Connector 1: for 5.5x2.1mm female . Connector 2: USB 2.0 A male . Output: for 5.5x2.1mm female or usb 2.0 A male . USB to for adapter plugs are very popular in daily life, meeting the indoor power requirements of many small digital devices in your home (note: please the size of the for adapter before purchasing) Power or USB 2.0 A male devices through a standard for 5.5 x 2.1mm plug/adapter, suitable for various small appliances, mobile phones, MP3, MP4, digital photo frames, U disks, , USB small lights, USB chargers The USB 2.0 A male port can also for devices. The for 5.5x2.1mm is widely used and is very convenient for various devices, such as players, LCD monitors The of the for adapter: the nickel-plated connector is corrosion-resistant, oxidation-resistant, corrosion-resistant, and has a long life span to minimum loss.