1)FSK and DTMF single 2)free calling recorder system 3)support windows 2000,XP,vista 4)1lines usb recorder box ,TYH8200 Quick ... to 50°c color:blackwarranty: one year type: usb recorder box line:1 linePackaging & DeliveryPackaging Detail: carton box:28*17*7 ... support windows 2000,XP,vista 4)1 lines usb recorder box ,TYH8200 Product description:The 1 lines recorder box is strong recording funtion, ...