1、Suitable for many kinds of acoustic instruments, such as guitar, ukulele, mandolin, banjo, etc. 2、It is able to eliminate interfering external sounds and not be influenced by sound reflections from nearby objects. 3、With 3 transducers, stick it onto the instrument, minimizing the damage to instrument body. 4、Easy to install and can transmit good sound quality. 5、Audio jack can replace the tail nail and install the strap. Features: Suitable for many kinds of acoustic instruments, such as guitar, ukulele, mandolin, banjo, etc. It is able to eliminate interfering external sounds and not be influenced by sound reflections from nearby objects. With 3 transducers, stick it onto the instrument, minimizing the damage to instrument body. Easy to install and can transmit good sound quality. Audio jack can replace the tail nail and install the strap. Specification: Condition: 100% Brand NeS Material: Metal + Plastic Cable Length: Approx. 60cm / 23.6in Jack Size: 6.35mm Pickup Diameter: Approx. 3cm / 1.2in Weight: Approx. 36g Packing List: 1 * Pickup Piezo 1 * Cable Tie 1 * Block Installation Method 1. Remove the tail nails and widen the tail holes to the appropriate width (about 1-1.5cm in diameter) (without tail nails, find the right position to open the hole) 2. Stick the patch to the position that is most acceptable for vibration, usually below the bridge 3. Attach a fixing pad to the appropriate position and fix the long connecting wire to the fixing pad with a fixing strip.