Adjustable cajon, Outartisan edition, Martinete line, tulip poplar resonant body, Brazilian ironwood (porous phoebe) face plate with ergonomically rounded ukola wood frame with convex contact, rounded corners and thumb notches for comfort and optimal playing sound, two sets of 10 adjustable strings (separated per side), 6 specially formulated rubber feet, decorative wood inlays, extra thick wood sound port ring for compression, two tuning screws for tension adjustment of each set of strings, pop filter in the sound hole.