Both iM207 and iM237 rely upon the same formula: each has a metal speaker grille on top, covering a single audio driver housed inside of an otherwise mostly plastic shell. The bottom of each shell unscrews to house three AAA batteries for 24 hours of run time, and a black device-agnostic audio cable wraps around the bottom sides for storage. Whereas iM207 has a 3.5” diameter and 1.5” height, iM237 has a 3.4” diameter and 2”…
