QWORK Power Failure Alarm, 2 Pack Automatic Power Cut Failure Outage Alarm 120db LED Indicator Smart Warning Siren Power by 9V Battery (NOT Included), Plug 220V
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- Power Failure Alarm The siren will alarm when the power supply is cut off until restore power; the warning could be manual muted by on off switch.
- Using Method Firstly place the bottom of the 9 V battery(not included) in the battery compartment according to the positive and negative poles.Then connect the alarm with 220V power and turn on the power switch.
- High voltage resistant design With the specially design, the siren can work fine even if the power voltage exceeds standard.
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