USB Inline Switch This USB ON/OFF Switch Cable is a upgraded version,Support both Data transmit and power supply It's not a simply USB Extension Cable, but with switch for Data and Power ON/OFF. Works for USB Fan, LED Desk Lamp and other computer peripheral low-power electrical devices, such as USB Wireless Headset, Mircophone etc. Specification: 28AWG, Length: 3ft /1.0 m, USB Male Connector to Switch: 2.48ft, Switch to USB Female Connector: 0.36ft. Support 5V, 2A Max Usage: When Press the Switch to'-',the cable will be disconneted,When Switch Press to another side without sign,the cable will connect.