Used only once. Purchased on December 7, 2025. I am selling it because the sound was not to my liking. Radius RK-DA60CK USB-C connection 32bit/384kHz Hi-Res DAC equipped ultra-compact portable headphone amplifier Unleashes the potential of Hi-Res earphones Equipped with high-performance chip "CX31993" High-purity single crystal copper + silver-plated cable Retail price: ¥9,130 - Model name: RK-DA60CK - Color: Black - Hi-Res support: Yes - Accessories: USB adapter - Brand: radius Bit rate/Sampling rate: PCM up to 32bit/384kHz Frequency response: 20Hz - 160,000Hz (@fs=384kHz) THD+N: ≧0.001% (@fs=192kHz, 16Ω load) S/N ratio: 130dB (@16Ω load, A-weight) Maximum output: 1.0Vrms (@16Ω load) Supported headphone impedance: 16Ω - 600Ω Connectors Input: USB-C plug / Output φ3.5mm stereo mini jack (3-pole) Power supply: Bus-powered Dimensions: 136mm (total length) Weight: 6g Compatible models: Android smartphones with USB Audio Class 2.0 and USB-C connection when using the main unit only PCs (Windows 10 or later, macOS 10.15 or later) compatible with USB Audio Class 2.0 when using the conversion adapter * Operation is not guaranteed on all USB-C and USB-A devices. [Package contents] USB-C (female) to USB-A (male) conversion adapter Thank you for viewing.