FCC and CE CERTIFICATION:This component works as a great alternative to the Arduino with no sacrifice made to its performance. BEAUTIFUL LOOK & PACKAGING: cool yellow-black design which is a departure from the standard, dull, black boards, the yellow silk screen on black mask make it easy to read the pin labels. This microcontroller can be used by connecting it to a computer with a USB cable or power it with an AC to DC adapter. Also, it comes with the USB cable. 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP headers and a reset button. KEYESTUDIO V4.0 board is updated with CP2102 USB serial chip, fully compatible with arduino.