The seller did not read the reviews, he did not correct the product description where it is written that AA batteries are used. I have to give 3 stars. In addition, the product looks quality but has a drawback that other buyers should think about before buying. This is Alarm Current: ≤ 10mA, others have Transmission Current: ≤ 20mA this is good for battery life but reduces the performance of the device indoors. Farther from the base in some places does not work due to signal weakness.
Inserts batteries not AA but AAA. Very inaccurate description