I purchased this item, checked its operation once, and then stored it in its box. Purchased last year from Soundhouse. The versatile BLUEY Compressor/Limiter, with a VU meter, is perfect for sound quality adjustment. - Model Name: BLUEY Compressor/Limiter - Connection Terminals: XLR, TRS - Control Knobs: Output, Attack, Release, Compression - Meter: VU Meter - Warranty: Included - Power Supply: AC Power Thank you for viewing.