The hotel doorbell system is generally considered to be a weak current system.What is it? Hotel doorbell system is a system normally contains doorbell press switches function, privacy and makeup room indicators. It known also as 'doorbell switch', 'doorbell system','DND switch', and 'touch doorbell system'.What it contains? KAHN Hotel Lock Pro is the world first hotel doorbell system combo with hotel door lock system, it does not need you install doorbell system additionally. Save your cost of buying, installation and maintaince.