Note: The sucker is fixed by the atmospheric pressure at the wall， so the more stringent requirements of the wall must be absolutely smooth wall and do not leak before you can install， so we must pay attention to when buying check yourself to be installed whether the position can be installed sucker. If you can not install wall mounted sucker， sucker can buy OUR assisted version KM2017， paste the wall sucker auxiliary plate， the suction cup mounted on the auxiliary board， will be solved.