2.4GHz wireless connection with up to a 10-metre range, even in the most crowded wireless environments Sculpted wireless mouse is designed to be both comfortable and easy to take with you Enjoy less hassle by going months without charging batteries - up to 15 months for the keyboard and up to five for the mouse Instant-access hot keys make it easy to watch videos, listen to music, or launch applications including your calculator, e-mail program, media player, and more Full-size keyboard with low-profile keys and integrated number pad helps you type and work more comfortably without feeling cramped Certified carbon neutral: the carbon impact of the product and packaging has been reduced to zero Plastic parts in MK320 include certified post consumer recycled plastic* - 71% for the keyboard, 49% for the mouse *Excludes plastic in printed wiring assembly (PWA), receiver and packaging