This transducer system consists of three of pickup heads. The two larger heads are wedged between the violin's top and each bridge foot. The third smaller head is stuck into one wing slot of the bridge. The position underneath the bridge's feet produces an extremely voluminous and smooth sound because the bridge applies vertical pressure to the piezo crystals. In this spot, the low frequencies and the sound elements of the violin's corpus are picked up. The pickup in the bridge's wingslot adds to the sound's brilliance. All three transducers together transmit a perfectly balanced violin sound. The exaggeration of the high-end frequencies, which are being jeopardized with other violin pickups, is eliminated directly at the sound source when using the Violinissimo. The jack is attached to the string holder with a velcro-type adhesive system, which is distinctively stronger, more durable, and sturdier than standard Velcro. It can be opened and closed repeatedly without affecting the pickup transmission. Violinissimo has been designed for musicians who mainly want to amplify their instruments electronically and who wish to achieve an extraordinary natural sound without feedback. Note: Requires a 1/4" male to RCA male cable (not included) to plug into your amplifer. If you need a standard 1/4" connection, consider the Violinissimo Pro model instead of this one. Technical Information: Bridge feet transducers: Round 1/2"; Height: 1/32" Impedance: High ohmic Jack: RCA female, Velcro attachment Pickup lead wires: About 5"