Feature:1. With 4band equalizer, rotate the bass/mid/treble to adjust the volume frequency.2. This product has phase and tuner functions, tone and volume control functions.3. With LED for battery check, replace the battery when Batt is on, very practically.4. Built-in microphone with mixed level control, small size and good performance.5. With a unique pivot design, 9V battery can be used immediately (without battery).Specification:Item Type: PickupMaterial: Plastic + MetalBattery: 9V battery (not included)Size: WLD: Approx. 55.8 x 84.2 x 41.3mm / 2.2 x 3.3 x 1.6inHole Size: LW: Approx. 50.8 x 67.62mm / 2 x 2.7inScrew Pitch: LW: Approx. 45.34 x 71mm / 1.8 x 2.8in.Package List:1 x Pickup4 x Screws2 x Mounting Bracket1 x Fixed Line Deduction1 x User Manual