ITEM NAME:Pro Mini Atmega328P 5V 16M Micro-controller Board for Nano Compatible 100% brand new and high quality Pro Mini Pro is a micro-controller board. It has 14 digital input / output pins (of which 6 can be used as PWM outputs), 8 analog inputs, a 16MHz resonator, a reset button, mounting hole pin head. 14 Digital input / output ports:TX, RX, D2 ~ D13 8 analog inputs ports:A0 ~ A7 1 pairs of TTL level serial transceiver ports RX / TX 6 PWM ports: D3, D5, D6, D9, D10, D11 Main ChipAtmel Atmega328P-AU Support Serial Download Support external power supply 3.3-12V DC Support 9V battery power supply 16MHz clock frequency Module size:(L*W) 3.30*1.80cm /1.30" * 0.71" Quantity:1pc 1Pc x Pro Mini Atmega328P 3Pc x Free pin.It has 14 digital input / output pins (of which 6 can be used as PWM outputs), 8 analog inputs, a 16MHz resonator, a reset button, mounting hole pin head. 1 pairs of TTL level serial transceiver ports RX / TX.