ReadyNAS RN 204 and UPS

Hi I have recently purchased a RN 204 and looking to ad a UPS. Quite frankly I find all the information rather confusing .... probably says more about me than the info! All I want is a UPS to protect the system in an outage (more than 10 minutes) and for the system to shut down gracefully by itself if I am away from the site. On reading the information I thought I needed a SNMP comparable system but this does not seem to be the case. I eventually found a page "How do I use uninterruptible power supplies (UPS) with my ReadyNAS OS 6 storage system?" [ http://kb.netgear.com/app/answers/detail/a_id/22814/~/how-do-i-use-uninterruptible-power-supplies-(ups)-with-my-readynas-os-6-storage?cid=wmt_netgear_organic] Here it says: "When any UPS battery is low or when a power failure occurs, the ReadyNAS automatically shuts down gracefully." But then it goes on with configuring the UPS, ie it needs to be compatible ... I assume that this is an option only and not a necessary requirement for graceful shut downs. For me I see no advantage in managing a UPS .. not even sure what I would be managing!! Can anyone please confirm if all I need is a UPS, with no management linkage via SNMP, etc.? In other words the ReadyNAS monitors the power input from the UPS and shuts down gracefully by itself ... a simple set and forget system. IN which cas any reasonable UPS will do. Thank you Stephen