Samson CM40 combines a chromatic tuner with a metronome in a compact unit. It offers Tone (manual) and Tuner (automatic) modes, a built-in microphone for acoustic instruments, and a 1/4" input/output for electronic instruments. Pitch calibration spans A430–450 Hz. The metronome runs 30–250 bpm with ten Beat settings and nine Rhythm variations. A full-color LCD, LED indicators, headphone jack, kickstand, and auto-off provide practical gigging utility. Powered by two AAA batteries included.