ITEM NAME:Acoustic Guitar EQ Equalizer Onboard Preamp Pickup Tuner for FISHMAN 101 Product Description Description: Acoustic Guitar EQ Equalizer Onboard Preamp Piezo Pickup Tuner for FISHMAN 101 Features: 1. Phase control button 2. Build-in tuner 3. Low profile control knobs 4. Low battery indicator(.Included: 1 x Onboard Preamp Pickup Tuner. Combined Battery box with preamp. Build-in tuner. Pre-wire pickup for solder-free, plug and play installation. Net weight: 83g. If item is defective after 3 months, you can still send it back to us.