This is the FIIO KA13. I've used it for about six months after purchase. In my subjective opinion, there are only minor scratches and dirt on the glass part, and overall, it's in good condition. I'll include a dedicated case (sold separately, about 1500 yen), and one pair each of Nicehck P03 (unused) size S and TRI Horn (unused) size S. Operation has been confirmed. Thank you. Manufacturer: FIIO Model Number: KA13 Color: Black Accessories: USB A to Type C adapter USB Type C to Type C cable USB Type C to Lightning cable Quick Start Guide -------------------‐Specifications-------------------‐ ・DAC chip: CS43131 x 2 ・Op-amp: SGM8262 x 2 ・Analog output terminals: 3.5mm single-ended headphone output (exclusive with S/PDIF digital output) 4.4mm balanced headphone output ・Digital output terminal: 3.5mm 4-pole S/PDIF output (exclusive with single-ended headphone output) ・Recommended impedance: 16~300Ω ・Output: 3.5mm 170mW@32Ω / 4.4mm 550mW@32Ω ・Frequency response: 20Hz〜50KHz (±1dB) ・S/N ratio: 123dB (32Ω, A-weighted, single-ended output) / 122dB (32Ω, A-weighted, balanced output) ・Dimensions: 56.3mm x 22mm x 10.5mm ・Weight: Approximately 18.5g (excluding cable)