6; When the faulty elevator is called, the elevator number will be automatically announced. 7: intercom status signal light prompt.
8: equipped with automatic inspection function. 9:5w power, with very strong anti-shielding performance.10: dedicated UPS charging power supply. This item is in the category "Business & Industrial\Office\Telecom Systems\Other Telecom Systems". The seller is "huangpai18" and is located in this country: CN. This item can be shipped worldwide.