The SPF series is the third generation of power frequency, online, and intelligent ups which is designed especially for powering network computer rooms, small intelligent equipment, measuring devices, industrial automation equipment, and precision instrument in industrials like finance, communication, insurance, transportation, tax, military, stock, energy, education, government, enterprises and so on. The spf series is especially suitable to provide power protection for extreme circumstances of power grid, as well as enterprise servers, small & medium sized local area network, small computer rooms and other delicate electronic instruments. The spf series puts stability above everything. You can count on it.