What is the quality of Beidou No.4 smart lock?

Beidou No.4 smart lock is of good quality. According to the public parameters of Beidou-4 smart lock, a 1.3 million dynamic high-definition camera made of pure steel is adopted. Beidou -4 3D monitoring intelligent door lock can be checked within one month by active visual intercom 180 seconds, and can be checked within one month by strangers staying and snapping for 5 seconds. It adopts1.30,000 dynamic HD camera, 4.5-inch 540*960 mobile phone-level indoor size, and is unlocked by 3Dtof anti-sunlight millisecond face recognition. Equipped with patented child safety lock, patented smart home lighting, patented regular patrol anti-lock function, and 6000 mAh lithium battery, it can stand by for 500 days and develop the system after seven years of verification.