Quantity   Component name
15 × 20~26 AWG hookup wire (qty in feet)
1 × 3.5mm 3-conductor stereo (TRS) in-line jack (female)
1 × 3.5mm 4-conductor stereo (TRRS) headset plug (male) Electronic Components / Misc. Electronic Components
1 × small electret condenser microphone
1 × 1" x 3" double-sided protoboard
3 × small SPST tactile switches
5 × 4mm high-density cable sleeving (qty in feet)
3 × 3:1 heatshrink tubing (adhesive, polyolefin, qty in inches)