Smart Lock / Smart Lock

People usually forget to turn off the lights when they left home hurriedly.It will creates waste. The smart lock has a indicator light in the handle of door，when the lamps haven’t been turned off,the indicator light will turn red,You just need to put the key in the lockhole, turn it,and the light will been turned off. Don’t need to come back the room and turn off the lamp.
The smart lock don’t only take convenience to our lives ,but also is a product for environmental protection and it can reduce the wasting
of the electric energy