I've always had bad luck with 60Hz UPS's - not one of them worked with Jamaica's 50Hz system and two of the four are Cyberpower, mainly because I didn't do enough research on my purchase. I spoke to an electrician and he said they are basically useless in Jamaica. Your best bet would be to check APC, TrppLite and Forza.
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PC - Ubuntu 15.04 64bit Desktop
HP Pav G60-236US 3GB RAM Laptop, Ubuntu 15.04 64bit and Win7 Home
"So Daddy, how come you telling me stealing not right when YOU copying DVDs? How come? How Come?"
RIP Ramesh ...