The Icom SP-33 is designed to take advantage of Icom's DSP-enabled rigs. It will work with all Icom base transceivers and receivers. The sealed speaker cabinet is made of black colored MDF (medium density fiberboard) to match Icom's high end base rigs. The hard-wire audio cable is terminated to a mono (1/8" 3.5mm) mini plug. This compact speaker is 5 x 6.5 x 5.5 inches (WHD) so it is great for conserving desk space.