Color: Blue - Quantity: 1 - Material: PCB board - Microcontroller chipset: ATmega8 (L) - Powered by Mini USB interface or pin on-board AMS1117-3.3 chipset. Provide jumper cable can set power supply voltage 3.3V or 5V - On-board crystal stand default external with 8M crystal - IO port leads out and marked - On-board ISP port - Reset circuit - AD converter reference voltage is applied to the filter inductor and capacitor - Great for AVR and microcontroller test