100% new and high quality EQ 7545R pick-up equalizer system with 4 bands can be easily fitted into your acoustic guitar and it is essential to electrify and amplify their sound. Under the saddle pickup for acoustic guitar Pre-wired for easy assembly 4 bands plus volume control Supplied with a battery box, Low battery indicator Connecting wire with 2.5mm plug included Presence Control: 12dB at 8KHz Bass Control: 12dB at 600Hz Middle Control: 12dB at 600Hz Treble Control: 12dB at 2.2KHz Frequency Response: 20Hz - 20KHz Power:9V alkaline battery (Not included) Color:Black Pickup dimensions: . 10.5 x 4.7 x 6cm/4 x 1.9 x 2.4inches (L*W*H) Material:plastic+metal Package Contents: 4 x EQ-7545R guitar pickup Kit 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.