1-10PCS Pro Mini Atmega168 16M 5V for Arduino Compatible Nano Replace Atmega328
For Arduino. Receiver&Transmitter. or 8 analog input port A0 to A7. 14 Digital input/output ports RX, TX D13, D2 ~~ of. The TTL level serial transceiver port RX/TX. Adapter Module. Step up module. Step down module.