Mouse and keyboard offer plug-and-play wireless convenience at up to 10m (33ft) of range with a strong and reliable 2.4GHz USB nano receiver Mouse uses precision optical tracking technology, and is ambidextrous with a mechanical scroll wheel and three buttons English language QUERTY keyboard has a number pad, with a layout optimized for use with Windows Whisper-quiet scissor keys and a noise-reduced mouse keeps your work area quieter, perfect for shared spaces Keyboard features 12 customizable FN keys that can be personalized using the Logi Options Software Mouse and keyboard are ultra-thin, increasing your workable desktop real estate Auto-sleep feature prolongs battery life, allowing the keyboard to offer up to 36 months of use before a battery change is needed, and 18 months for the mouse, depending on usage