The Mooer MICRO DI is a smart direct input box with ultra low distortion, it quietly transfers the sound of guitar or bass directly to your audio system. Balanced/unbalanced output, gain switch, cabinet simulator and ground lift function are included. The Mooer MICRO DI is very small yet exquisite with its full metal shell. Specifications: Input: 1/4" monaural jack (impedance: 1M )Output: 1/4" monaural jack (impedance: 1k Ohms)Power Requirements: AC adapter 9V DC (center minus plug) (not include