Please Note: Home End PgUp and PgDn buttons work with /7/8/10 however NOT with for OS. The Num button works with /7/8/10 however NOT with for OS. Adds a number pad with 3 USB 3.0 ports to your existing keyboard to your PC/ Laptop for quick and comfortable data entry; Saves on syncing time with data transfer rates of up to 5 Gbps (much than USB 2.0); Backward compatible with USB 2.0 / 1.1. Easy to Use: Simply plug this keypad into an available USB port and it's to use. No drivers or other software downloads are required to use this keypad. 9.8inch Shielded Cable makes a safe and efficient data transfer for maximum performance and longtime usage; Built-in surge protector safeguards your devices and data safe. No Driver required; Easy to set up Plug Play Hot swappable. Ultra-thin Design: Toss this thin and compact keypad in a laptop bag or briefcase to efficiently enter data wherever you go. Compatibilities: Windows 98SE /ME /2000 /XP /Vista /7/8 /10 Linux 2.4 or above Power Usage Alerts: 2.4Ghz wireless devices such as wireless keyboard and mouse adapters may not work in to USB 3.0 devices or . Connecting to a USB 2.0 port is recommended. It is not recommended to use this USB hub for too many peripheral devices with high energy consumption (those exceeding a combined current of 5V 900mAh among all ports) Two external 2.5inch hard drives without any additional power supply to bring the USB port of the PC is already at limit. This hub is not meant to as a stand-alone charger. It is not compatible with iPads or any other devices with irregular charging requirements. Colour:silver Material:ABS plastic Package Contents: 1 x USB Number Pad Only the above package content other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is /- 1-3cm.