Fortunately it was in promotion!

Ordered by promoting Amazon.com (35.56 euros). Replaces the mouse without energy wire and reaching the mad mouse of a Desktop HP Pavilion 5170. The keyboard is a bit wide 19.7 cm (attention to the depth of your computer cabinet shelf!). The touch keyboard is dry, sketchy and noisy. The mouse is comfortable to the touch and its handling. For installation is simple: Insert the supplied batteries for the keyboard and mouse, place the mini receiver to a USB port and start your Pc. Under XP installation plug and play immediately. Download software from Microsoft to customize keyboard shortcuts and mouse options. Big complaint already noted: Absence of a switch on the mouse to extend the life of batteries. I complete my review by stating that I have to replace the batteries in the mouse after 4 months of use (an average of 4 hours per day).