MFJ’s most popular keyer is small but big in features giving you adjustable weight and tone and has front-panel volume and speed control (5-65 WPM). Has built-in dot-dash memories, speaker, sidetone and auto or semi-auto/tune modes. Keys solid-state or tube transmitters. Fully shielded. 9-volt battery or 110 VAC with MFJ-1312D.
Keyer mounts on paddle base to form a small 4 x 2 1/4 x 4 1/4.