Active pick up system for double bass 2 under-bridge-pick ups only 0,46 mm thin, pick up the vibrations of the strings and the body Pre-amp with volume and tone controler for mounting in front of the tailpiece 3 Volt (2032) coin cell, durability approx. 1 year Output: 6,3 mm jack plug socket Measurements pickup: 41x21mm, measurements pre-amp:67x30x38mm 918.046
