PAGOW 2 Sets Acoustic Guitar Pickup, 3 in 1 Pickups Piezo Transducer, Microphone Contact Self-adhesive Mono Piezo Pickup with Bu

Applications : 3 IN 1 Transducer Pickup System fit for most string music instruments, amplify an upright bass, banjo, violin, ukulele, viola, cello, mandolin, resonator guitar,etc. | Premium Material : Quality ABS Plastic, Electronic Part: Metal, Color: black lines, silver tone. | Size : Small size, portable and easy to use. Cable Length: approx. 57cm/ 22.44”, 3-pack Piezo electric Disk Dia. : approx. 27mm/ 1.06”, Endpin Jack Dia. : approx. 6mm / 0.24”. | Self Adhesive : The plastic squares is a self adhesive block to mount the extra wire in your box, without pre amp they will work well. | Easy to Installation : No Battery and Soldering Required, pre-wired piezo mic save time for you, easy to install, convenient to use.