Unilateral Retractable Cable-hide USB Optics Mouse： 1. It is very suitable for notebook, and quickly clean and collect, and easily to carry with you. 2. Don’t need take battery on your person as same as RF mouse, also no trouble of charged, it’s wired when using, and wireless when no use, very convenient to you. 3. To add one USB cable each piece, could be use for desktop PC. 4. That could be collected anytime to use as to manage PC handy for you, where in shop show, office, and publish place. Noted: 1) The professional mouse manufacturer are Welcome to inquiry about cooperation, that we can just only supply the unilateral retractable devices to you to produce mouse. 2) Products detail, please look at website= tianshingsu.diytrade.com.