Features: . The USB cable with switch. With this, the days are gone that you have to plug and unplug the USB cable, just a slight press; the operation will start/end. It can be used on Raspberry pi, as well as other similar application, like USB lamp, usb fan, Driving Recorder, LED Desk Lamp etc. Error-free data transmission. Not only for power supply,but also for data transmission. With LED indicator,you can see the working status. This USB 2.0 Extension Cable for USB charger,when fully charge,turn off switch,no need to put out USB cable Support for PC and Mac users to bring USB peripherals,such as hard drives, printers, mouse, keyboards, and USB hubs. Specifications: Item Type: USB 2.0 extension line Material: Plastic Color: Black Cable length: (Apporx.) 50cm,100cm/(Optional) Quantity: 1 PC (other accessories demo in the picture is not included) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 X USB 2.0 Extension Cable With ON OFF Switch (No retail package)