HiLetgo 51 AVR ATMEGA8 Programmer USBasp USB ISP 10 Pin USB Programmer 3.3V/5V with Cable Main Chip:ATMega8A-AU.Support AVR and ASP chip.Support AT89S51/52 microcontroller. The output port is an ATMEL standard port. With overcurrent protection.Automatic speed control.With power and write indicator lamp.With USB power and target board support target voltage 5V, can choose by jumper cap connection. Autospeed autofocus firmware, the downloader will automatically track the chip frequency to be programmed, automatically change the speed, to achieve automatic speed control. Reserve MOSI, MISO,RET,SCK,VCC,GND. 6pin interface, user-friendly interface to connect the target board. Reserved programming interface, the user can upgrade the download firmware.