Product Video KS0497 Keyestudio V4.0 Development Board keyestudio10/20/20210 The processor core of Keyestudio V4.0 development board is ATMEGA328P-PU , fully compatible with ARDUINO UNO REV3.It has 14 digital input/output pins(of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. Click here to Keyestudio Wiki KS0497 keyestudio