Brand : Logitech Model : T400 Color : Black, Gray (Random) Hybrid traditional-and-touch mouse for Windows 8: Dedicated touch zone strip plus familiar mouse buttons and precision for simple, easy navigation Comfortable rubber grip: Sculpted shape wrapped in textured rubber for better handling. Glass touch zone optimizes smooth scrolling and sense of control. One click to Windows 8 Start screen: Instantly access your favorite apps on the new Start screen Wireless simplicity: Tiny Unifying receiver connects up to six compatible mice and keyboards using just one USB port Extended battery life: Get up to 18 months of power without a battery change (Battery life may vary based on usage and computing conditions.)