Type: piezoceramic coaxial cable
The pickup sensor is embedded in a coaxial cable of 2 mm diameter and 6 cm length. The Highlander pickup was actually developed for acoustic guitars where it is situated inside the guitarbridge. For the use with a double bass, a small groove is routed in the tailpiece side of the bridge, and the PU is pressed in the groove. The preamps is housed in a little bag of black nylon, which mounts to the tailpiece.
This pickup can be found factory installed in the Fichter Electric Upright Basses.