Korg TM-40 Large Display Digital Tuner and Metronome for $21.99 Shipped

Korg TM-40 Large Display Digital Tuner and Metronome for $21.99 shipped.  Here is a screenshot for your reference.  It features detection range of C1 (32.70Hz) to C8 (4186.01Hz) for a sine wave with reference tone of C4 (261.63Hz) C5 (523.25Hz), along with tuning modes that have both meter mode and sound out mode.  Most places have the Korg TM-40 Digital Tuner and Metronome for about $32 or more.