Smart door magnet housing 2.0 (double AA batteries) 

big Enclosure:72*26*19 ,Small Size:40*15*15mm

The shell of the universal smart door magnet in the market is made of Apple white PC. With No. 7 battery compartment. Excellent workmanship, scientific structural design, and simple assembly. Completely equipped, the unit price includes the positive and negative contact sheets of No. 7 battery, magnets, and 3M stickers on the back. The same series also has temperature and humidity, water immersion, human body induction, vibration induction and other shells with the same appearance