micro KEYER III™ is the most powerful single radio All-In-One USB interface and the only USB interface to fully support voice operation including microphone switching. With an single USB port, microKEYER III™ works with any Windows-based logging or control program for CW, voice, FSK and digital (FT8, RTTY, PSK31, SSTV, MFSK, JTxx, etc.) operation. micro KEYER III™ includes a radio control interface that supports all standards (RS-232, CI-V, Kenwood and Yaesu TTL), a powerful CW memory keyer using K1EL's WinKey, a Digital Voice Keyer, two channel audio for transceivers with dual receivers, automatic microphone selection, and a buffer/sequencer for amplifier or LNA control.