Features: The Pickup are designed specifically for acoustic Guitar. Sponge protection inside, not easy to scratch the guitar, not easy to fall. Fast charging for 3-6 hours, continuous use for 90-100 hours. Equipped with microphones board function. Easy to install. Designed for sound clarity, ease of installation and preservation of your instrument. Specifications: Materials: Metal and Plastic Styles: 6306 tail nail style or 6304 tail nail style Size: as shown in the picture Package Includes: 1set Acoustic Guitar Pickup note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.