It has three pickup heads; two bigger pickup heads are wedged between the violin and each bridge foot and the third, smaller pickup head is wedged into one wingslot of the bridge.

The jack is attached to the string holder with a special dual-lock Velcro adhesive

Bridge feet transducers:
Round 1/2"
Height: 1/32"
Impedance: High ohmic

Bridge wing transducer:
Rectangular 1/2" x 5/16"
Height: 1/32"

Impedance: High ohmic

Length of the 3 Pickup connection wires: About 5"

Jack: RCA female