Leegoal 1pkg Guitar Violin Viola Cello Banjo Contact Mic. Pickup High Quality Professional Piezo Microphone Instrument Pickup/Piezo Transducer - 1/4" jack with 9 inch cable Includes velcro but not putty attachment options Just plug it into your amp, or other recording equipment Can be mounted on virtually any acoustic instrument including Guitars, violins, pianos, horns, harmonicas and even on your neck to pick up your voice! Has the advantage of being able to eliminate interfering external sounds and not be influenced by sound reflections from nearby objects.