According to data, as of the end of 2018, China's elderly population aged 60 and above was about 249 million, accounting for 17.9% of the total population, and the total number of elderly people will ···

Internet of Things security control system as the Internet of Things era hardware and software, operating systems, communication protocols, cloud platforms, the advantages of the integration of all as···

With the continuous popularization of smart locks, we are beginning to understand more and more about smart locks, but, because of the knowledge of smart locks is still relatively vague, so there are ···

Fire lock classification: 1, fire locks: general class A fire door are basically used on the fire lock, it has a lock body, lock cylinder, fire handle, and the key. 2、Fire protection passageway lock:···