Product DescriptionDescription This AVR Programmer is a USB in-circuit programmer for Atmel AVR controllers. It simply consists of an ATMega88 or an ATMega8 and a couple of passive components. The programmer uses a firmware-only USB driver, no special USB controller is needed.Features Works under multiple platforms. Linux, Mac OS X and Windows are tested. No special controllers or smd components are needed. No 64K program limits! Perfect support WIN7 64-bit Support S51 and AVR chips, faster than the parallel port ISP, more stable; best choice for notebook, computers which without parallel port . (S51 series can not be burned and downloaded with 3.3v). Plug and play, no need to install any drivers