if you are interested in this product please feel free to cotnact us for more detailed informations. main features and specifications : 1 ) floating logo 2 )your company's logo can be put into the liquid 3 )color and floating can be selected according to your requirement. 4 )high resolution 800 -1200dpi 5 )optical surface scanning, can be used virtually on any surface without mouse pad 6 )without mouse ball,cleaning is not necessary 7 )very precise cursor movement 8 )interface : usb, ps/2 and u+p combo are ports available 9 )switch: 60+/-15gf 10 )advanced optical design, exact orientation 11 )system requirements: pc for ibm xt/at, 386, 486, and pentium compatibles 12 )supporting os: windows 95, 98, 2000, me,nt or xp one years guaranty safety/quality approvals:ce,fcc address: 4/f,building 11, new tongfuyu industry park, longhua village, longhua town shenzhenguangdong zip:518109 tel: 86-755-61123680 contact: bill woo homepage: http://www.bnjep.com