Ball joint allows the holder to rotate in all diretcions to offer you better viewing angle.
With infrared sensor inside, it can detect whether there is object blocking the light so as to secure automatically.
Electric capacity design solves the problem of unexpected power failure. When the electricity fails, this phone holder can still unfasten the clamp twice by the remaining electricity in the capacity, to let you take out your phone.
One-handed operation, mount to most kinds of air vent.