1. Adds a number pad with 2 USB 3.0 ports and Audio port 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 faster than USB 2.0); Backward compatible with USB 2.0 / 1.1.2. Ultra-thin Design: Toss this thin and compact keypad in a laptop bag or briefcase to efficiently enter data wherever you go.3. Easy to Use: Simply plug this keypad into an available USB port and its ready to use. No drivers or other software downloads are required to use this keypad.4. 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.5. Ultra-thin and compact; No Driver required; Easy to set up, Plug Play, Hot swappable.Compatibilities::Windows 98SE /ME /2000 /XP /Vista /7/8 /10Linux 2.4 or abovePlease Note: , Home, End, Ins, Del, PgUp and PgDn buttons work with for Windows XP/Vista/7/8/10, but NOT fit for Mac OS.The Num Lk button works with for Windows XP/Vista/7/8/10, but NOT fit for Mac OSPower Usage Alerts:2.4Ghz wireless devices, such as wireless keyboard and mouse adapters, may not work in close proximity to USB 3.0 devices or hubs. 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 2.5 hard drives without any additional power supply to bring the USB port of the PC is already at its limit.This hub is not meant to serve as a stand-alone charger. It is not compatible with for iPads or any other devices with irregular charging requirements. Colour:SilverMaterial:PC plasticSize:155 x 95 x 21mmPackage Contents:1 x USB Numeric Keypad Only the above package content, other products are not included.Note: Light shooting 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.