[Compact Yet Powerful: The SK02 employs a minimalist and stylish design language. Despite its small size it boasts mighty features. It supports DSD256 and PCM 32bit/384kHz high-resolution decoding along with 3.5mm single-ended and 4.4mm balanced headphone outputs. Its robust power can easily drive wide range of headphones and IEMs with an impedance range of 16-300 ohms Stunning Performance: It features a high-end ESS SABRE ES9038Q2M DAC and SGM8262 op-amps. Its excellent circuit design ensures superior parameters with a SNR as high as 120dB a low noise floor of only 3.7μV and an incredibly low THD of 0.001%. The 4.4mm balanced output power reaches an impressive 1100mW at 32 ohms. The exceptional high-resolution capability and pure sound quality make every listening experience an extraordinary sensory journey "User-Friendly Design: The SK02 requires no drivers and offers plug-and-play convenience. It integrates a big multi-functional control knob allowing easy access to power on/off play/pause and volume adjustments. The unit features quick-switch buttons for high/low gain and input modes. Additionally its colorful indicator lights enable effortless identification of the current working mode and the songs sampling rate" Remarkable Versatility: Supports USB and optical input widely applicable for decoding with computers laptops CD players TVs and projectors. Not only can it function as a headphone amplifier but it can also serve as a preamp pairing with active speakers or an amplifier like Fosi Audio V3 ZA3 TB10D amp and passive speakers to form a desktop listening or home audio system Exquisite and Durable: The SK02 is crafted from a single piece of aluminum alloy using CNC machining and a delicate sandblasting process. This not only gives it an exquisite appearance but also ensures lasting durability]