Volkanox Graphite Series Wireless Keyboard And Mouse Combo (VK20077BK) - Mouse - Controls: 6 buttons, Scroll Wheel, DPI adjustment, 2 Side Buttons, Sensitivity Settings: 1000 / 1600 / 2400 DPI, Chipset: Pixart 3212, Receiver: 2.4 GHz Nano USB Receiver Shared with Keyboard, Range: Up to 8 m / 26 ft, Size: 110 x 74 x 32 mm / 4.3 x 2.9 x 1.3", Keyboard - Keys: 124 Tactile Feedback Keys, Special Function Keys: 20 Dedicated Shortcut Keys, 12 Programmable Function Keys, Receiver: 2.4GHz Nano USB Receiver, Range: Up to 8 meters / 26 feet, Size: 458 x 185 x 22 mm / 18 x 7.3 x 0.9-inches