I am selling this item because I purchased it used and hardly used it. One knob is aftermarket. The USB cable is aftermarket. Everything in the pictures is included. It can be used as a USB DAC or a digital recording device for analog records, etc. USB bus-powered. 【Specs】 Frequency Response: 10 Hz to 50 kHz, +/- 0.5% THD: Noise: >90 dB below clipping Input Impedance: 47k Ω/100pf (phono), 270k Ω (line) Maximum Input Level: 40 mV rms @ 1 kHz (phono), +19dBu (line) Maximum Gain: 45dB @ 1 kHz (phono), 6dB (line) Analog Input Connections: RCA (preamp / phono/line input) Analog Output Connections: RCA (preamp line output), 1/8 inch (monitor/headphone output) Maximum Output Level: +6dBu (1.4V rms) Filter Type/Characteristics: Switchable, high pass (low cut) –3dB @ 22 Hz A/D-D/A: 16 bit, 44.1 kHz or 48 kHz, USB selectable from computer 0.4 ms A/D latency @ 44.1 kHz Digital Audio Interface: TOSLINK Opto In to USB, TOSLINK Opto Out from USB, S/PDIF coax (RCA) In to USB Computer Interface: USB 2.0 Case: Aluminum black anodized, rubber ends Power: USB bus power or 7-12V DC or 9-12V AC @ 150mA (power adapter: sold separately) Dimensions: 47 x 117 x 114mm Weight: 0.61 kg Please check the HP for details. ■Notes ・Please refrain from price negotiations. ・The condition of the product is based on my subjective assessment. ・Please judge the details, such as the appearance, from the images as it is a used item and individual preferences may vary. ・As it is a used item, there may be minor scratches and stains. Please purchase only if you understand this. Product support, claims, and returns are not supported.