Everyone of us must be have the similar
experience，frogot bring the key and standed outside the door
until other family members get back home.How can we avoid the happening of this
situation？It is very easy，just install the smart
lock.
The
smart lock based on ZigBee HA standard，and you can control it
remotely by your mobile phone，so you never worried
about forgetting to bring your key.How to use your phone to open the door，open
the interface of the smart lock，enter the password，and
than click the picture，it will open.More than
that it has three other unlocking modes.Firstly，entering password of the
lock.Secondly，using the electromagnetic key，and
if you lost a key，do not worry，you
just need to reset the other keys，and do not have to change
the whole lock.Thirdly,using the nfc tag.Using the phone which support nfc to
close to the tag.
Smart lock have two power supply systems，for the lock is very important in our home，we must ensure its normally work.Every system need four
batteries，you can use two years.If
you forget to replace the batteries,there are two contactors for the 9v
battery.
The smart lock with a simple
installation.Just replace the old，it can use for all kinds of the door.
There is a i key on the back
of the lock，it is use for add the key，set the password of the lock，and join in the ZigBee network.
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