Features: Support AT89S51/52 microcontroller Supports all AVR asps chip. The output port is atmels standard port. There is USB power supply and the targets board supports a targets voltages of 5V, which can be selected through jumpers connection. AUTOSPEED automatic speed regulation firmware, the downloader will automatically track the frequency of the chip to be programmed, automatically change the speed, and achieve automatic speed regulation. Reserve MOSI, MISO, RET, SCK, GND. 6PIN interfaces, convenient for users to connect to the targets board as need. Reserve the PROGRAMMING programming interfaces, and users can upgrades the downloader firmware themselves.Programming software: AVR_fighter, PROGISP1.66, PROGISP1.67, PROGISP1.68. It can compiles lower or higher software and burn chip in 1go, which is very convenient. Specifications: Component:Plastic Size:Approx.68.5x20.4mm/2.7x0.8inch Option Type:1pc AVR Microcontroller,3pc AVR Microcontroller; Power:3.3 V 5V Chip:ATMega8AAU for WIN8.1/8/7/XP 32bit/64bit Computer; Package Includes: Package A 1pc AVR Microcontroller(with Cable) Package B 3pc AVR Microcontroller(with Cable) note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.