Description Specifications Mfr Part Number: IM-KBCOBV8 Features: Five programmable macro keys for advanced gaming experience Quick and easy macro recording without additional drivers or software Anti-ghosting technology Disable Windows key during gaming to avoid accidental pressing Durable heavy: duty design with laser carved key caps Powerful 3- color letter illuminated keys with adjustable brightness 12 practical multimedia hotkeys for internet and music High quality membrane tactile key switch available Multi-language version Interface: USB Keys: 110 keys Button Durability: 5~8 Million Times Operating Voltage: 5V±0.25v  Operating Current: 50mA Operating Temperature: 0 ~ 40 °C Operating Humidity: 20-90% Cable Length: 1800mm Color: Black System Requirements: Windows 2000/ XP / 7/ 8/ Mac/ VISTA Dimensions: 19.80 x 10.55 x 0.94 inch / 503.0 x 268.0 x 23.8 mm Weight: 2.50 lbs / 1133.2 g