Product Name: REALFORCE 23U Color: White Switch: Electrostatic Capacitive Non-Contact Key Weight: 45g Key Printing: Dye-sublimation Connection: USB-A Cable Length: 0.8m Supported OS: Windows REALFORCE's tenkeypads are comfortable and provide a great feel, reducing input errors, making them ideal for those who frequently enter numerical data. I have used it for about 3 years, but I am selling it because I am switching to a Mac. Thank you for your consideration.