This gaming keyboard is designed for game playing. Crack backlight of 3 colors is full of personality. Big keys and heavy weight make gaming operations more easy. High-quality workmanship and exquisite detail, all for bringing user joyful gaming experience. Features: Crack backlit design, cool and full of personality. Adjustable backlit of 3 colors and adjustable brightness of 3 levels, more choices, more flexible. Big keys,curved caps, perfect to fit fingers. Anti-slip patches provide strong adsorption capacity,effectively avoid moving when playing game. Heavy and ergonomics design, all bring player joyful gaming experience. Specifications: Backlit color: Red, purple and blue Key life: ܱ0 million times Working current: ܳ50mA Working voltage: 5V DC 0.5V Support system: For Win7 / 8 / Vista / XP / 2000, for OSX 10.2 Material: ABS Keyboard size: 47.5 * 19.5 * 2.5cm / 18.7 * 7.7 * 1.0in (L * W * H) Keyboard weight: 626g / 1.4Lb Package size: 52.8 * 19.0 * 3.5cm / 20.8 * 7.5 * 1.4in (L * W * H) Package weight: 807.0g / 1.8Lb User tip: 1. There are 3 adjustable backlighting colors (blue, purple and red). Press FN + SL to switch the colors. 2. There are 3 adjustable brightness levels (33%, 66% and 100%). Press FN + or FN +to adjust it. Package list: 1 * Keyboard 1 * User manual (English)