Power on, and the operation of each knob and switch is all fine. It's in beautiful condition. The VC1Q is a pre-amp/channel strip, a piece of professional audio recording and mixing equipment with a compressor function. It features TRS/AUDIO jacks and XLR audio inputs, providing flexible connectivity for various studio environments. With digital coaxial RCA, TRS, and XLR audio outputs, it enables high-quality sound transmission to a wide range of equipment. This model is made by Joe Meek and is suitable for musicians and sound engineers to enhance their audio production capabilities. The Studio Channel VC1Q is a professional recording device with frequency adjustment capabilities. - Model Name: Studio Channel VC1Q - Frequency Adjustment: MF, MFf, HF (1.8k, 2k, 2.2k) - VU Meter: Yes - Power Switch: Yes - Color: Green Thank you for viewing.