Size: 9.8*3.4*1.3cm Cable Length:15cm/50cm/1M/1.8M In-Box: 1* 4-port USB 3.0 hub Color: Black/Blue/White LED Light A blue LED light indicates the status of the connection of the USB hub for you to monitor the performance. Durable Material This USB 3.0 Splitter is made of tough PVC, reinforced cable, and heat-resistant material for long use life. Perfect Design Taking into account the space required by different U disks, a practical distance is designed for each interface, and the four ports can be plugged in simultaneously without pressure. Please Note: 1. This USB hub does not support charging for the phone or other devices. 2. The specification of USB 3.0 was made by the industry standard to allow a total consumption of up to 900mA. A total current above 900mA may cause performance instability. For a stable connection, avoid connecting devices that exceed a total of 900 mA. Devices are usually rated as follows: Mouse 100 mA / USB Flash Drive 100 mA / Camera 300 mA / Keyboard 500 mA / External Hard Drive 900 mA. 3. 2.4 GHz wireless devices (such as wireless keyboards and mice), MIDI devices, and some USB 3.0 devices may not be supported, or may not work in close proximity to a hub or other USB 3.0 device. 4. Pls note different configs of the keyboard and mouse will affect your experience, this USB port expander supports USB 3.0 data transfer. Set up the correct mouse speed in the PC control panel if it lags Also please check if the right dpi of the mouse has been chosen if there's.