Trust Nanou, Optical, RF Wireless, 1000 DPI, Grey Trust Nanou. Movement detection technology: Optical, Device interface: RF Wireless, Movement resolution: 1000 DPI, Buttons quantity: 3. Product colour: Grey http://www.digitalversus.com/computer-mouse/trust-micro-mouse-p9042/test.html Of course on the technical side this mouse is not strong at all. Everything scores low: responsiveness, frequency, sensor... Its LED sensor requires the use of a mat, otherwise expect it to get jumpy (worsens with the shininess of the surface). It does... Stands up to a weight of 70 Kg placed on top, Available in numerous colours, Wellbuilt, Very short cable: around 80 cm (good for a netbook!), Kids will love it! LED sensor requires a mat, Very basic components, The sensor won't work if you move too fast, Very short cable: 80 cm (not practical for a fixed computer) A practical purchase then. Forget its tech score - makes no sense on such a product. You'll choose it for its size, colour and, above all, resistance....