USB interface support USB devices such as USB flash disk, USB mouse, USB keyboard and etc. Suitable but not limited for Galaxy S2, Galaxy Note, Galaxy S3/S4, Galaxy Tab3 8.0, Xperla NX-02D, Xperla acro HDIS12S. REGZA Phone-TO1D, and S-series Tablet Draws power only from OTG port, current for USB devices is limited to host capability With USB2.0 4-Port Hub, for Mouse, Keyboard, U disk, Camera, Printer and so on. Easy plug and play installation device, no external power needed No driver needed for Android and PC with USB Supports supply extra power through Micro-USB port if necessary.(Please take note: Extra power only charge for accessories such as mouse keyboard etc,can not charge for smartphone or tablet) Colour: Black material: plastic Size: 20cm Package Contents: 3 * Micro-USB cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.