KNA SG2 SIMPLE Piezo Electro Acoustic Guitar Pickup System - NO DRILLING - NO BATTERIESPortable bridge mounted piezo with volume control for steel string acoustic guitar With onboard volume control, SG 2 is a perfect choice in a piezo pickup for guitar. Its an acoustic bridge pickup that transfers the natural sound of your instrument without requiring modification. SG 2 installs safely and securely between the bridge saddle and pins, held in place by the tension of tuned strings. Install with no modification SG 2 installs safely and