Simple, reliable USB audio playback — no software installation required Play USB voice files directly: copy audio files to the device with a fast copy process; no installation or setup required. Compatible with XP series, WIN7, WIN8, WIN10. Why this product matters Eliminates setup delays: copy files and start playback immediately, reducing installation time and user effort. Stable, predictable operation: built-in mature instructions and automated instruction analysis improve application stability and reduce errors during use. Clear, usable controls: manage common playback functions (previous track, next track, play, stop, and song selection) without extra software. Key features and performance Direct USB file support — simple drag-and-drop file transfer and fast copy speed. Control functions: previous track, next track, playback, stop, song selection for straightforward on-device operation. Audio performance: 24-bit output; dynamic 90 dB; ratio 85 dB. Practical use scenarios Retail or public spaces: quickly update announcement or background audio by copying files to USB and using on-device controls to change tracks. Education and training: deliver recorded lessons or prompts without software setup; stable instruction handling ensures reliable playback during sessions. Small events or demonstrations: fast content updates and basic playback controls let non-technical users operate the system quickly. What sets it apart No driver or software installation combined with mature instruction analysis for dependable performance. Straightforward file management and common playback controls make it suitable for users who need immediate, reliable audio playback. High-quality 24-bit output with dynamic 90 dB and ratio 85 dB for clear sound within its intended applications. Technical summary File input: USB voice files (direct copy) Installation: no software required Compatibility: XP series, WIN7, WIN8, WIN10 Controls: previous, next, play, stop, song selection Audio: 24-bit output; dynamic 90 dB; ratio 85 dB