Guitar Bass Pickup with 3 Band Active EQ Equalizer Preamp Circuit and Control with Fittings Specification: Features: 1. Dual potentiometers design, offers better control of . 2. Decrease the noise and amplify the sound of bass. 3. Balance volume for pickup. 4. With necessary accessories for easy installation, practical and convenient. 5. Ideal for guitar bass lovers. Specification: Material: Plastic Color: Shown as picture Power Supply: 9V Battery Not included Weight: 98 g Package List: 1 x 3 Band EQ Preamp Circuit 1 x 9V Battery Compartment 1 x Large Nut 1 x Large Washer 5 x Small Nuts 5 x Small Washers 2 x Screws