The Micro Tutor is the second in the series of Micro-Kits The Main feature are: Low cost Small size Easy to build (only 11 parts on the PCB) Speed control via buttons (5 to over 50 WPM) Variable SideTone ( 650 to 1000 Hz) Built-in practice oscillator Low curent consumption (1uA in standby) 'Farnsworth' mode for easier learning Wide range of operating voltages (4.5 to 15 VDC)