良好天气工作日，周日和节假日除外，除非已使用，但仅按照实际使用时间计算。
WWD Sunday and Holiday excepted, unless used, but only time actually used to count.
从使用情况方面来看，导航仪的屏大电量相对较大，同时也受增大音量，开启音场特效，频繁操作等因素影响，实际使用时间也会有一定差异。
In addition, affected by the volume increase, sound field special effects, and other factors such as frequent operation, the actual duration may be different from specified one to a certain extent .
存储介质同电力供应与成像质量无关，但同实际使用有关，两者都会影响总体成本和连续使用时间。
Storage medium with power supply and imaging quality has nothing to do, but with actual use relevant, both will affect the overall cost and continuous use time.
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