Built-in touchpad with easy control mouse functions Silent X type scissor keys for a quieter and better typing experience Portable Design: Dimension of 9. 05 x 6. 30 x 0. 90 in; 5. 90 ft long, durable cable 2 extra USB ports: 2x USB 2. 0 hubs built into the keyboard for extra input devices If your alphabet typing appear with numbers (like J, K, L, etc ), you may press Fn + Numb lock together to enable or disable the number lock function