specifications 1)Input voltage:150V~250V 2)Output voltage:220V,¨¤3%,110V,¨¤3% 3)Frequency:50HZ/60HZ 4)Response time:>7.5V/S 5)use-pattern:continuance 6)Ambient temperature:-10centigrates ~+40centigrates 7)Temperature rise:5M|¸ 11)extension time:5,¨¤2mins 12)Over voltage protect:246V,¨¤4% 13)Under voltage protect:184V,¨¤4% good quality and best price, custom-made is also accepted welcome your any calls at any time!!! contact person:elise lin Tel:0086-577-61718113 mobile:0086-18367862388 Products Models are below or also can be as your requirements Model Output Power Outline(L*W*H) Net Weight TSD-3K 3KVA 38*25*15cm 27kg TSD-5K 5KVA 40*28*17cm 32kg TSD-8K 8KVA 40*28*17cm 40kg TSD-10K 10KVA 40*28*17cm 45kg