FR4 Funduino UNO Board for Arduino - Red
Adds two I2C pins (SDA SCL) next to AREF; Adds two pins next to RESET one is IOREF allowing expansion board adapt to on-board voltage the other pin is for later use; RESER is more stable and more convenient to use; Digital I/O: 0~13; Analog I/O: 0~5; Supports USB protocol and power supply; Supports ISP download; Supports SCM TX/RX port; Supports AREF port; Supports Pin11 Pin10 Pin9 Pin6 Pin5 and Pin3; Input voltage: DC 7~12V; Output voltage: DC 5V / DC 3.3V.