Ak power 850va ups offline 850va/510w, 2x universal socket wave form battery mode (simulated sine wave) ac mode (synchronize with input) 7ah battery, uk power cord mercury 850va ups backup time typical 15mins~25mins (depending on load) input voltage 220vac input frequency 50hz single phase power cord built-in cable with fuse input voltage range 140~300vac rating output 850va