This is a professional plug-and-play USB & RCA audio interface designed for desktop audio, multimedia systems, and portable applications. The device supports 2 RCA stereo inputs and 2 RCA stereo outputs, featuring built-in level control knobs and monitoring functionality for seamless signal switching, mixing, and monitoring. Compatible with all domestic operating systems (such as HarmonyOS, Kylin OS, UnionTech UOS, etc.), it requires no driver installation and operates plug-and-play, ensuring cross-platform universality. The device offers comprehensive functionality in level adjustment and integrated monitoring, making it suitable for home theaters, music production, and conference systems, guaranteeing pure audio transmission and real-time monitoring.
| Category | Parameter Item | Parameter Description |
| Audio Performance | Input Channels | 2 x Stereo RCA (Unbalanced, Line Level) |
| Output Channels | 2 x Stereo RCA (Unbalanced) + 1 x 3.5 mm Monitor (Stereo) | |
| Sampling Rate | 44.1 kHz / 48 kHz (USB Mode) | |
| Bit Depth | 16-bit | |
| Frequency Response | 20 Hz～20 kHz (±0.5 dB) | |
| Total Harmonic Distortion + Noise (THD+N) | < 0.01% (1 kHz, 0 dBu) | |
| Signal to Noise Ratio (SNR) | > 96 dB (A-weighted) | |
| Dynamic Range | > 96 dB | |
| Maximum Input Level | +26 dBu (RCA); Monitor Output: +8 dBu | |
| Level Adjustment Range | -∞～+20 dB (per channel independent knob) | |
| Isolation and Noise Suppression | Noise Suppression | > 50 dB (EMI/RFI filtering); Ground loop isolation (>40 dB, 50/60 Hz) |
| Crosstalk | < -80 dB (channel separation) | |
| Maximum Transmission Distance | > 50 m (RCA cable, no attenuation) | |
| Interfaces and Connectivity | USB Interface | USB Type-C (power + data, 5V/500 mA) |
| Input Connectors | 2 x RCA female jacks (gold-plated, unbalanced) | |
| Output Connectors | 2 x RCA female jacks (gold-plated, unbalanced); 1 x 3.5 mm TRS (monitoring, 16-32 Ω headphones) | |
| Impedance (Input/Output) | Input: 10 kΩ; Output: 1 kΩ | |
| Compatibility and System | OS Compatibility | Windows 7, 8, 10, 11+, macOS, Linux (ALSA), HarmonyOS 3.0+, Kirin OS, and other domestic systems (Plug-and-Play) |
| Driver Support | Driver-free (UAC 2.0 compatible); optional ASIO 2.0/Core Audio | |
| USB Protocol | USB Audio Class 1.0/2.0, hot-swappable | |
| Latency | < 5 ms (USB transmission) | |
| Physical and Environmental | Dimensions (L x W x H) | 70 mm x 36 mm x 100 mm |
| Weight | 0.39 kg | |
| Enclosure Material | Metal, blue spray-painted | |
| Operating Temperature | 0°C～50°C | |
| Storage Temperature | -20°C～70°C | |
| Humidity | 5%～95% (non-condensing) | |
| Power and Safety | Power Input | USB-powered (5V DC, from host) |
| Power Consumption | < 2 W (typical, all channels active) | |
| Software and Control | Configuration Tool | No software required |
| Compatible Software | DAW (Audacity, Reaper), media players (VLC, Foobar2000) |
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