Sign up for an Award
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
Whether do you have such kind of trouble when you get home every day that there is no night light or the light is too dim.But you have to choose the right key among many keys.
Now the idea of the "induction" door handle is originated in this phenomenon.When you turn the doorknob,Its
signal induction sign will be lighted up. a certain frequency electromagnetic waves will be emitted from it, which will be received by a induction chip in the matched key, and the electromagnetic wave induction lamp will light,
so you can know which
is the correct key. This method is simple, convenient, fast, and it is a useful way to save
your precious time
Wei Gu . Yun Huang . Bo Guo