◆ Personal item. Only used once at home. ◆ No visible scratches or stains. Beautiful condition. ◆ Retail price: ¥17,999 Features: Hi-Res certified, lightweight, 6 types of RGB lights, volume adjustment, filter conversion support Connectivity: Wired Memory storage capacity: 64 GB Color: Blue 【Ultra-Powerful Chip】 The S9 Pro Plus adopts the DAC chip ES9038Q2M, supporting a maximum of 32-bit/768kHz PCM sampling rate, and achieves perfect sound source reproduction with a high signal-to-noise ratio of up to 128dB and an ultra-low THD+N of -120dB. 【Powerful Output Efficiency】 138mW+138mW@32Ω 3.5mm SE / 180mW+180mW@32Ω 4.4mm BAL, easily drives low-impedance IEMs and headphones. It also provides outstanding desktop-class performance. 【Diverse Filter Effects】 The S9 Pro Plus offers 6 filter options, realizing a high-resolution sound quality experience. By simultaneously pressing the "+" and "-" buttons, you can switch between 6 filter effects with different RGB lighting visual effects. 【Low Noise, Low Distortion】 Distortion is reduced to 0.0019% for SE PO (3.5mm) output, and extremely minute distortion, only 0.0008%, is achieved for balanced output BAL (4.4mm). The signal-to-noise ratio is 123dB/120dB, and the separation reaches 75dB/115dB. 【Wide Compatibility】 The S9 Pro Plus adopts a standard Type-C terminal, ensuring excellent compatibility with a wide range of platforms including Windows, Mac OS, iPad OS, Android, iOS, and Harmony OS. Shipping is planned via Yu-Packet Plus. Hidizs DAC S9 Pro Plus Martha USB C Dongle BAL 4.4mm SE 3.5mm