Designed for miking the acoustic upright bass without permanently installing a transducer. Clamps easily to bass bridge and removes easily - no drilling or tools needed. This transducer is a favorite for its ability to capture the full musical range of the upright - delicate tones to deep lows. Includes the 3000A preamp. Quality Materials & Components Included: Pickup/Transducer: Clamp-style piezo bass transducer Preamp: 3000A Piezo Buffer Preamp with EQ One set of rubber feet (4 each) Attachable belt clip with one set of dual lock attachment strips Velcro strap Black metal strap-mounting bracket with one set of adhesives Installation instructions Replacement/extra: B3150M- bass piezo transducer sold separately (without preamp) Clamp-style pickup can be easily attached to or removed from any standard-type bridge. No drilling or tools needed. Equally responsive to delicate high tones and deep lows. Delivers a full musical range of upright basses.