Built to be tough! Introducing the Crystal. Inspired from this very notion, the unique transparent crystal shell body stands out from the crowd. Trust us! The robust keys are a delight to work on. Engineered to be durable, the lifecycle of up to 20 million keystrokes are nothing short of impressive. COMPATABILTY WINDOWS VISTA, WINDOWS 7, WINDOWS 8,WINDOWS 8.1, WINDOWS 10, AVAILABLE USB PORT COLOR TRANSPARENT FEATURES - HOT KEYS - ROBUST BUILT QUALITY - EASY TO CONNECT USB - QUIET KEYS - ERGONOMICALLY DESIGNED OPERATING VOLTAGE 4.40 ~ 5.25 VDC Dimension L x B x D : 46 x 15 x 2.5 cm Weight (Grams) 577 SWITCH LIFE 20 MILLION KEYSTROKES KEYS 104 NORMAL KEYS AND 4 HOT KEYS Warranty 1 Year Included Items Keyboard