Can someone just take the batteries out and open the window from the inside? Will it alert that batteries are low or out?
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Hello Will. Thank you for your question. These are indoor sensors. The sensor uses 2 AAA batteries and a tiny Phillips. You can unscrew the battery compartment to swap or remove the batteries. The alarm comes with a sensor for battery level. You can check the battery level of the sensor in the app: Devices tab > Sensor > Battery %. Hope this helps. LV - Swann Team
