I purchased this item new and stored it, using it very little! I have confirmed that it works! It's in near-new condition, but since it has been used, there may be minor scratches. Please refrain from purchasing if you are overly concerned about this. 【High-Quality Sound】 The Fosi Audio PH04 is a 4-channel headphone amplifier that delivers clear and powerful sound quality. 【Easy-to-Use Volume Control】 Each channel has independent volume control, allowing for individual volume adjustments. 【Compact Design】 Small and portable, it can be easily connected to any audio system. - Brand: Fosi Audio - Model: PH04 - Number of Channels: 4 channels - Features: Volume control - Power: Uses the included adapter - Input Terminals: Multiple input terminals - Size: Compact design Thank you for viewing. Headphone Amplifier