ON-OFF SWITCH & VOLUME CONTROL 带电源开关的音量控制
on-off switch volume control
开关音量控制
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The earpiece has an on-off switch, a three-stage volume control and uses a rechargeable battery.
WSJ: Testing, Testing...Can You Hear Better Now?
Software might be able to offer a good on-screen volume control option and it might be able to mitigate the off switch problem a little, but not enough to keep either issues from being extremely annoying.
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