Based on the Alembic F-2B Tube Preamp. 
Built in pedalboard friendly format. 
Voltage is converted internally to 250VDC. 
- Genalex 12AX7 Preamp Tube
- True Bypass 
- Pedalboard Friendly Enclosure 
- Power supply included with purchase 
- Anodized Aluminum Knobs
- Dimensions: 4.8” x 2.6”
- Current Draw: 422mA
- Inputs : 1 x 1/4”
- Outputs: 1 x 1/4”
- Power: Center negative (Boss Style)
Comes with 1-year workmanship warranty.