Overview: HDMI-compatible o return and digital-to-analog o converter outputs TV sound via optical, coaxial, 3.5mm, and RCA (L/R) interfaces simultaneously using the HDMI ARC feature. Supports conversion of digital o signals (optical or coaxial) to analog stereo output. Features: 1. HDMI-compatible ARC functionality allows transmission of TV o to optical, coaxial, 3.5mm, and RCA (L/R) outputs at the same time using a standard HDMI cable. 2. Digital-to-analog o converter accepts digital input via optical or coaxial ports and converts to analog stereo output via RCA (L/R) or 3.5mm jack. 3. Supports remote volume control when using TV’s ARC function; volume can be adjusted using the TV remote (compatible with RCA and 3.5mm outputs when enabled on TV). Specifications: Color: Black Material: Aluminum alloy Power supply: USB Maximum operating current: 100mA Operating temperature: -10°C to +55°C Storage temperature: -20°C to +60°C Operating humidity: 10–90% RH (non-condensing) Storage humidity: 5–95% RH (non-condensing) Case dimensions: 90 x 73 x 21 mm Weight: 92g Notes: 1. Ensure your TV has an HDMI port labeled "ARC" and supports HDMI ARC functionality. 2. Set the TV’s o output to PCM or LPCM when using HDMI ARC. For 3.5mm or RCA analog output, the source must be set to PCM/LPCM. 3. Enable ARC volume control on the TV to allow volume adjustment via TV remote (supports RCA and 3.5mm outputs only). 4. Use a standard 19+1 HDMI cable to ensure ARC functionality. 5. Select the appropriate input switch when connecting different digital o sources. Package Contents: 1 x ARC o Extractor 1 x USB Cable 1 x User Manual Note: Lighting and display settings may cause slight color variations between the product image and actual item. Measurement tolerances may vary by ±1–3 cm.