The wireless desktop keyboard and mouse MK345 combines comfort and modern design with powerful features. The full-size keyboard is designed with an integrated number pad, which is helpful for data entry. Comfortable wireless keyboard and mouse combo enhances productivity. Full-size keyboard features low-profile keys and integrated number pad. Sculpted wireless mouse is designed for both comfort and easy portability. 2.4GHz speed delivers a reliable, long-range connection. Operating range of up to 30' (actual wireless range may vary with use, settings and environmental conditions). 12 enhanced F-keys provide instant access to your favorite applications and makes it easy to watch videos, listen to music, or launch applications. Batteries last up to 3 years for the keyboard (2 AAA, included), and up to 18 months for the mouse (1 AA, included). Battery life will vary depending on the product configuration, product model, applications loaded on the product, power management setting of the product, and the product features used by the customer. As with all batteries, the maximum capacity of this battery will decrease with time and usage.