The visitor can conveniently call and talk to the household through the host in front of the downstairs unit. The household is open and closed at the indoor control unit door. The host of the community can receive the resident alarm signal at any time and send it to the duty host to notify the community security personnel. It not only enhances the safety and security of high-rise residential buildings, but also greatly facilitates the residents and reduces the unnecessary troubles of going up and down the building. Ufo High Bay Light,Aluminum Industrial High Bay Light,Waterproof Ufo High Bay Light,Outdoor High Bay Light zhongshanshi huadengxing lighting co., ltd , https://www.ledhdx.com