looks like a nice plug and play kit, i believe the actual "head unit" is made by JBL
JBL makes multiple models so actual specs would just be a guess, i had researched theses as a possible option when replacing the last head unit in my SERK
specs of 1 model
Details
JBL MBB218 Sirius-Ready AM/FM Receiver (Consists of faceplate and black box)
Splash-proof face
Sirius-ready
4 x 45 watts
AM/FM tuner
Unique two-line display
Preamp outputs (2 pairs)
CD-Changer Control (no CD mechanism in actual unit)
iPod-Ready (aux-in)
Faceplate size: 7 1/8"W x 2 1/8"H x 1 3/8"D The "black box" stereo is a first in the marine industry! It focuses specifically on eliminating the potential problem of water intrusion in a marine stereo. The MBB218 comes with a waterproof faceplate as well as a separate box, functioning as the "brain" of the unit, that can be placed anywhere! This box allows boaters to put it in a water-protected area. In this era of portable media, many boaters are more interested in bringing along their iPod than in using a traditional CD player, so we designed the MBB218 with no CD mechanism. Instead, it's equipped with aux-in to plug in either an MP3 player or a variety of other types of portable media