K&K bass master pro - this is basically a bass max and a double big twin pickup combined, that uses a stereo cable into a K&K blender/preamp. (all included).

http://www.gollihurmusic.com/product/1423-KANDK_SOUND_BASS_MASTER_PRO_UPRIGHT_BASS_PICKUP_SY STEM.html

It's a nice setup to have, you can balance the two pickups and get anything from a 50's era thump to a more modern jazz tone. Everything is in good condition and working order. asking $175 or best offer.