Features Durable and sleek design Superior Stretch Silica Gel Material, Excellent Elasticity UV Print Technology Adopted, Long Life 12 Multimedia Hotkeys, Fn + (F1 to F12) Spill Resistance Keystroke Lifetime : Over 30 Million Strokes Key Switch : Rubber Membrane Key Switch Connection Type : Keyboard USB Specifications Keystroke Lifetime: ≥ 30 Million Times Working Voltage: 5V Working Current: ≤ 55mA Keystroke Drawing Force: ≥ 1.5KG Keystroke Operating Force: 55 ± 7g Operating System : All Microsoft Windows and Mac Warranty : 1 year