当电池在单位内是低的，警报音将听取和红色主导LED一次将打开每15秒。立即替换新的电池。
When the batteries in the unit are low, an alert tone will be heard and red LED will light up once every 15 seconds. Replace new batteries immediately.
当电池在单位内是低的，警报音将听取和红色主导LED一次将打开每15秒。立即替换新的电池。
When the batteries in the unit are low, an alert tone will be heard and red LED will light up once every 15 seconds. Replace new batteries immediately.
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