CL7604N is without touch function, CL7604NT is with touch function. It is a 7 inch TFT LCD USB Powered monitor, with 800x480 resolution, 250cd/m2 brightness, 500:1 contrast which can display clear images. One USB Cable does it all! Not need Power Adapter, not need VGA etc. 1) Duplicate  Copy the primary monitor's picture, when requiring more picture, it can easily handle. 2) Extend It can expand the primary monitor's picture, enlarge display area, conveniently cope with multitasking. 3) Primary Monitor Can set the USB monitor as the primary monitor, deal with all special needs. * The original primary monitor will be closed.     One PC Can connect 6pcs USB Powered Monitors at the same time Can be used on meeting or school etc.  Operating Systems Support Windows 7 (32 & 64 bit) Windows Vista (32 & 64 bit) Windows XP (32bit) Mac 10.5  Leopart Linux Win 10 Windows 8.1 (32 & 64 bit) (without touch screen) Manericks 10.9 Mountain Lion 10.8 (without touch screen) Mac Lion 10.7 10.6Tiger 10.4 (without touch screen)     It has hidden bracket, can make this monitor stand alone.  Also as the built-in speaker, if there has audio output it does not need to connect external speaker equipment.               Application USB Powered Touch Screen Monitor as Multiple Input/Output Device for Video Conference, Instant Messaging, News, Office applications, Game map or toolboxs, Photo Frame and Stock Casting. It can be integrated into point-of-purchase or point-of-registration process. This cost-effective method is to have multiple consumers/customers register, enter information, and authenticate. For Social way like SKYPE / Google / WHATSAPP Chat while using other full screen applications, you can keep your Twitter up all the time but off your main work screen. It is great for use with a small laptop or netbook because of its light weight and single USB connection, it can travel with your laptop, no power adapter needed!