welcome to my store, Hope you have a pleasant shopping trip! Features:It is a ATmega 128 Development Board.It has ISP interface and JTAG interface,which can be downloaded through ISP or through JTAG emulation or download.The IO ports of the board are all led out,and the power supply also has lead pins for easy expansion.Specifications:Input Voltage:DC 3.3V-5VInterface:ISP interface,JTAG interfaceInterface:ISP interface,JTAG interfaceInterface:ISP interface,JTAG interfaceWork Temperature:-25?~85?Work Humidity:5%~95%RHSize:100*72*22mmPackage List:1 X ATmega 128 Development Board1 X USB square copper core wire5PCS X jumper cap4PCS X screws4PCS X copper pillarNotes:1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.2. Please allow 1-2cm slight dimension difference due to different manual measurement.