hindi ko masasabi Effective yan, dahil hindi naman yan kagaya MITSUI
may Built-in Anti High Voltage Lock Circuitry (AHVLC) at iba pa. but for me its better than walang first line of Defense, for me it more on Fuse lang yan with some voltage regulation.
What i mean voltage regulation gaya niya maintain low voltage 200v or high voltage na 250v
But Much durable than the Surge Protector.
for Mitsui if above 260v na stop AVR bellow 200 like 170v kaya pa niya supply at regulate papunta sa Power Supply ng Computer which sa murahing AVR like Secure or Ecopower wala.
Masmalaki at Masmabigat transformer ng Mistui. halos 3x weight and 3x Size. purpose niyan is regulate the Voltage