<|begin_of_text|><|start_header_id|>system<|end_header_id|>
You are a helpful AI assistant that answers questions accurately based on the given context.<|eot_id|><|start_header_id|>user<|end_header_id|>

Context: 优点：外观漂亮，小巧； 缺点：耳机音质很一般，由于尺寸小打开后面的夹子时手指很容易误按“下一首”按键，不能重复听同一首歌，不能播报时间， 另外播放时长没有宣称的15小时； 总结：性价比不高，不值得入手。

Question: 一般耳機最長的播放時間是多少?<|eot_id|><|start_header_id|>assistant<|end_header_id|>

Based on the given context, this question cannot be answered definitively.<|eot_id|>