promicro

I would like to cycle 9 volts of power to an RF Transmitter https://media.digikey.com/pdf/Data%20Sheets/Seeed%20Technology/113990010_Web.pdf via a 5 Volt ProMicro https://cdn.sparkfun.com/datasheets/Dev/Arduino/Boards/ProMicro16MHzv1.pdf. Is the transistor (perhaps the 2N222) the only...