Keyboard • 36-month keyboard battery life Familiar key shape and feel, whisper-quiet • 3 tilt positions (natural, 4°, and 8°) • Spill resistant design • Abrasion resistant key print • Advanced 2.4GHz wireless (10 meters) • Wireless encryption • Tiny USB receiver with Logitech Unifying™ Technology • On/off power switch • Caps lock indicator light • Battery indicator light Mouse • 18-month mouse battery life • Contoured shape with soft rubber grips • Full-size and ambidextrous • Advanced optical tracking • 3 buttons, scroll wheel • On/off power switch