E mea maere mau te mau hoho'a peni o te mau hoho'a peni: Te mau nota --- Te mau mana'o tauturu no te haapiiraa --- i roto i te high-frequency AC ---transformation thru the high-frequency transformer --- Te mau nota, Te mau nota --- PHPF. The mains strength we typically use is 50hz, and 50hz AC strength desires to be converted thru a transformer, however the low frequency results in an extended transformer winding, which makes the transformer cumbersome and calls for lots of wires. After turning into a high-frequency alternating current, a exceptionally small transformer may be used to step down, saving value and space.