step-up & step-down transformer POWER:50VA,75VA,100VA,150VA200VA,250VA,300VA,350VA500VA, ... ,3000VA,5000VA,7500VA,10000VAIntroductionThe fixed step-up & step-down transformer is an ideal step-up & step-down power. It ... drop from 200V to 110V or climb from 110V to 220V, with the wave not distorted. It possesses a ... imported electric devices. 110V-->220V220V-->110V up-down transformer HBD,new type