Descriptions: A. New and high quality B. Professional guitar and bass tuner C. LCD display D. Powered by 6F22 9V battery (no include) Low battery check LED Auto or manual tuning mode Specifications: 1. Frequency Response: 20Hz-20KHz 2. Control Range:Bass: ±12dB at 60Hz Middle: ±12dB at 500Hz Middle 2: ±12dB at 1.2KHz Treble: ±12dB at 3KHz Presence: ±12dB at 8KHz Mid2. Control: 600Hz~2KHz 3. Tuning note: Chromatic/Guitar Mode 4. Chromatic & Guitar Tuning Mode(7B/6E/5A/4D/3G/2B/1E) 5. Pick-up: Piezo Ceramic Pick-up 6. Dimension: 4.06 inch x 2.48 inch 7. Weight:200g Color: Black and Red Material: Plastic + Metal Package Contents: 1 x Guitar Pickup Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.