USB Switch On Off Data and Power Extension Cable Cord 3 feet with 303 Rocker Switch USB 2.0 A Male + 303 Rocker Switch + USB 2.0 A Female, No need to pull the cable to restart or reboot your devices, just press the button to turn on and off Add an on/off switch button for Driving Recorder Power Cable, LED Desk Lamp, USB Fan, Bedside Lamp and other computer peripheral low-power electrical devices: USB Card Reader, USB Disk 28AWG, OD:3.2mm. Total Length: 1m / 3 Feet, Support 5V, 3A This adapter is a upgraded version,Can be for power supply and Data transmit,When The Switch Press to'-',the cable can be data and power,When Switch Press to another,the cable will not work.