【CX31993 Decoding Chip】SP4 uses CX31993 high-performance DAC decoding chip, which can support up to 32bit/384kHz sampling rate. Superior compatibility, more portability, and bringing pure sound, to enjoy the HiFi high-fidelity music.

【4 Strands OFC+Silver Plated OFC Mixed Cable】SP4 uses 4 strands OFC and silver plated OFC mixed cable, which improves the three frequencies comprehensively, making the layering more distinct and the sound more pure.

【High Quality Microphone】The SP4 has a high quality microphone to ensure that calls are clear and free of noise. Users can easily play and pause music, switch songs, and control volume with the 3 buttons on the microphone.