Separate audio, charging and lighting requirements
Choose the playback sources first, then review the listed charging and lighting functions. WS-1857 and WS-5390 both provide concrete references for this discussion. If a feature is central to the buying decision, ask how it operates and what information is available for the selected configuration.
Prepare specific evaluation questions
Ask about the intended charging procedure, the supplied instructions and the lighting controls. Avoid converting an ambiguous battery entry into total capacity or an assumed runtime. The lighting feature guide and sample checklist help organize the review.