This is the S.M.S.L SU-1 USB DAC. Despite its compact size, it features an AKM AK4493S DAC, known for its high resolution and excellent signal-to-noise ratio. It's suitable for improving sound quality in a desktop environment and is a good entry point for PC audio. I am selling it due to a change in specifications. 【Condition】 ・Excellent condition with no noticeable scratches. ・Operation confirmed via USB connection. ・No problems during use. 【Key Features】 ・DAC chip: AKM AK4493S ・USB input supported ・RCA analog output ・Small size, low heat generation, and easy to install 【Included Items】 ・Original box ・USB cable ※Instruction manual is not included (available as a PDF from the manufacturer's official website) 【Additional Information】 This DAC adjusts the volume through the connected amplifier. It has a simple configuration with a neutral sound signature, making it easy to use with any genre of music. 【Shipping】 The original box will be carefully wrapped in cushioning material and shipped in a separate cardboard box. Shipping is expected to take 4-7 days. Please ask any questions you may have before purchasing.