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With the Boss AD-2, electro-acoustic guitar players get a natural, studio-quality sound when performing on any stage. Connections: 6.3 mm in/out, 6.3 mm line out TRS, Power supply: 6LR61, 9 V, Battery life: approx. 6 hours

• Power supply: 6LR61, 9 V
• Battery life: approx. 6 hours
• Notch filter for feedback suppression