Features: brand new and high quality Sound hole pickup equalizer are designed specifically for acoustic Guitar. Easy of installation. Easy to replace battery. They are soundhole control preamps for guitar. They are designed for sonic clarity, ease of installation and preservation of your instrument. Soundhole-mounted knob allow the player to make easily accessible adjustments. Endpin preamp system offers clear, transparent tone, dynamic string response. Specifications: Material: ABS Color: As The Picture Shows Package Weight: approx.55g Size: approx.43x52x24.2mm/1.7x2.0x0.9in Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 Set of Guitar Soundhole Pickup