Thank you for viewing. I have confirmed the input/output using a condenser microphone and verified that there is no scratchiness in the input/output, EQ, and monitor faders/volume controls. SD card playback and Bluetooth connection are also possible. The effects panel may still have the protective plastic on it, but there are some scratches. There are no other noticeable stains or scratches. The following is a quote from the sales page: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The Mackie New Onyx mixer features a USB I/O capable of 24-Bit/96kHz multitrack recording and the acclaimed high-gain Onyx microphone preamps. The ultra-low noise design delivers true professional sound. It also features high-quality DSP effects and a British-style Perkins EQ. It also has an SD card for recording and playback, making it useful for various applications such as home recording, content creation, and live sound PA. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ■ Number of mono channels: 8 ■ Number of stereo channels: 5 ■ EQ: 3-band EQ (MID variable) ■ AUX: PRE x2 + FX (POST) ■ Group (Bus): - ■ Main output: TRS phone/XLRx2 ■ Digital effects: 1 ■ USB I/O: 〇 ■ Recording function: 〇 ■ Bluetooth music playback: 〇 ■ Phantom power: 〇 ■ Rack mount: 〇 (using a separately sold rack mount kit) ■ Dimensions (W x H x D): 476 x 136 x 356mm ■ Weight: 6.9kg ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I purchased this used from a professional equipment retailer and used it once at an indoor event. I am selling it because I am changing equipment.