Widely installed in home, hotel, office, meeting room, show room, shop, hospital, supermarket, school etc. It is very important for us to provide high quality and service possible to our customers,Please keep in mind that we got you cover with a 5-year warranty, We can return or replace at any time.<br>If you have any questions, please feel free to contact the seller, we will do our best to help you. <br>Installation video is in the picture.<br>The packaging has been reinforced.