As others have said, the mounting that came with it is for the front only and it's way too heavy to trust those supports

Following is the breakdown of my rating:-1 star for the USB not working, making it useless to shutdown my computers and use the other functions supported by the UPS.-3 stars for the replacement also failing with the same problem.+1 star for excellent product support, no waiting to speak with a representative, and no charge for return shipping to their RMA dept., along with timely shipment of the replacement unit

however the unit sags down because there is not enough support for it otherwise