Mooer Micro DI with Gain, Pad, and Cabinet Simulator w/ 2 Cables Full metal shell, Very small and exquisite. Input: 1/4" monaural jack (impedance: 1M Ohms ), Output: 1/4" monaural jack (impedance: 1k Ohms). Power Requirements: AC adapter 9V DC (center minus plug), Current Draw: 12 mA.