Korea president office to national police department uses our product such as wireless SMS device and digital voice record phone. Cngsoft is proven company by korea government.1. Wireless SMS device could send thousands of sms(short message service) with ez-click. Do not open your data-base to any other company. You could keep all important dbs in your PC.CDMA versions are availble. 2. Digital voice record phone - at first, hook with your PC through USB. Hook the phone line. And you are ready to use. Our mpeg4 compress rate could let you record the voice over 3month with only 80 gbyte. Day/5days)This unit is proven through the korean finance market(such as banks, e-trade companys, tour company... )