Cloudtail Shipped this product to me via Delhivery and they manhandled somehow which led to the internal fan breaking when arriving and the UPS not working properly and shutting down unexpectedly every so often. AMAZON DOES NOT HAVE A RETURN POLICY ON THIS PRODUCT so they did not help me more than tell me how to contact the makers of the product APC.Thankfully APC were exceedingly cooperative and sent an expert to look at the product and it was he who determined that the fan was broken by opening it up. I contacted support on the night of 9th Jan, a support expert came to my house the very next day on the 10th, put in a request for a fix or a replacement immediately, APC very helpfully decided to just give me a replacement for the whole unit which I received on the 12th which now works wonderfully.I have a desktop which is an i5 6500 and a GTX 1070 configuration and a BenQ 1080p 24 inch monitor and under a light load of browsing, the unit has an uptime of more than 15 minutes which is the longest I've been able to test without risking damage to my desktop and is adequate for my needs. When under battery power the fan makes a fair amount of noise but it's not that loud and a small sacrifice for protecting some very expensive components.On the whole, EXTREMELY satisfied with the product and APC, the manufacturers and EXTREMELY DISSATISFIED with the delivery process.

 The UPS was defective on arrival. It isn't using the mains power supply no matter which wall socket I connect it to and it is operating in battery mode.EDIT: Amazon was kind enough to send me a replacement but the replacement was also defective on arrival. It shuts down after a minute of backup, shows a red color with a continuous beep. This happened even though UPS was fully charged.I'm extremely dissatisfied with this piece of crap. I don't think I'll buy an APC product ever again.

I have connected APC with 5 systems in 4 output port. 1. KDL-55HX750 Sony Bravia, 2. Sony Home Theatre System cum Blue Ray Disc Player, 3. Airtel Digital TV HD, 4. BSNL Modem & 5. Sennheiser Bluetooth Wireless Head Phone system connected with Sony Bravia. During power failure, all systems continue to work as normal without any disruption.I have tested it for 10 mins by switching off mains. It was quite normal.I am fully satisfied, rather I would say delighted to have the product which not only gives uninterrupted viewing but protects my equipment from surges and frequent changeover from Main to Society Generator and back.