5pkg Guitar Violin Viola Cello Banjo Contact Mic. Pickup A professional Piezo Contact Microphone pickup - 1/4' jack with 10 inch cable Contact microphones pick up sound by being in direct contact with the sound source It comes with double sided tape and self adhesive Velcro for multiple mounting options Also included is a self adhesive clip and a screw on clip for mounting the jacka Just plug it into your amp, bass amp or other recording equipment