LE-650H2 is the hardware-based USB analyzer, which can record a large amount of data on the HDD/SSD of the PC, display translation with each class decode, and measure VBUS power consumption. The analyzer automatically detects the High/Full/Low speed of USB2.0/1.1 and starts measuring by simply pressing the space bar of the PC. The low cost device of easy operation by connecting it to the USB port of the PC is useful for developing/debugging the firmware/driver and study purpose of USB standard.