Replace your lost or failed power adapter. This replacement power adapter can provide a power source for any electronic device that has an H type barrel jack and requires 5 volts and up to 2 amps of power. The adapter is a perfect replacement for the lost or damaged power adapter you\'ve used to power your existing electronics. When downtime isn\'t an option, keeping spare power adapters on hand ensures that you won\'t be left waiting for a replacement to arrive or have to replace your devices just for the sake of a compatible power source. This power adapter is a direct replacement for the power adapters included with the following StarTech.com products: Dual-Bay 2.5in Hard Drive Enclosure (S252BU33R); 3-Port Portable USB 3.0 Hub plus Gigabit Ethernet (ST3300GU3B); 4 Port Compact Black USB 2.0 Hub (ST4202USB); 4 Port Black USB 2.0 Hub (ST4202USBGB); 7 Port Compact Black USB 2.0 Hub (ST7202USB); 7 Port Black USB 2.0 Hub (ST7202USBGB); 15m USB 2.0 Active Cable with 4 Port Hub (USB2EXT4P15M); 10m USB 3.0 Active Extension Cable (USB3AAEXT10M); 3m USB 3.0 Active Extension Cable (USB3AAEXT3M); 5m USB 3.0 Active Extension Cable (USB3AAEXT5M); 4K HDMI 4-Port Video Splitter (ST124HD4K); Wireless Display Adapter with HDMI (WIFI2HDMCGE); 4-Port HDMI Automatic Video Switch (VS421HD4K).