Thank you for viewing. SONY MX-50 microphone mixer with 3 microphone inputs and master volume. There are scratches on the surface. Operation confirmed. No original box. - Model: MX-50 - Brand: SONY - Number of inputs: 3 - Number of outputs: 1 - Master volume: Yes - Level adjustment: Level adjustment knobs for each microphone Runs on 4 AA batteries. AC adapter not included (sold separately) Sold as is.