Hid Led Tester is a simple USB（interrupt mode）device tester package. There are firmware and software in it. Hid Led tester follows USB HID protocol, we don’t need to install driver for the device, and Windows (Win 2000 and later) will install the device automatic.-Hid Led Tester is a simple USB (interrupt mode) device tester package. There are firmware and software in it. Hid Led tester follows USB HID protocol, we don t need to install driver for the device, and Windows (Win 2000 and later) will install the device automatic.