BestDealUSA Piezo Contact Microphone Pickup For Guitar Violin Banjo Ukulele OUD Professional Piezo Contact Microphone pickup - 1/4" jack with 10 inch cable. Includes velcro but not putty attachment options. Plug to your amp, bass amp or other recording equipment. Can be mounted any acoustic instrument including Guitars, violins, Mandolin, Nanjo, Ukulele, dulcimer, pianos, horns, harmonicas to pick up voice!