另镀金胸针还可以佩戴使用。
建议初次使用背背佳从2 - 4小时开始，适应后逐渐延长佩戴时间，从安全角度考虑睡眠时不宜佩戴使用。
Recommend the initial use back back good 2-4 hours from start to adapt to gradually extend the wear of time, from a security point of view should not be worn during sleep to use.
经验表明，该装置可以整天佩戴并保持舒适，并且可以每天使用。
Experience shows the device can be worn all day, every day, without discomfort.
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