... 100,300,2000,5000 2..good quality and fine price 3.Input voltage:AC 110V or 220V 4.good after-sale ... service TC-100 Step Up and Down Transformer 1.type:TC-100,300,2000 ... voltage:AC220V lr 110V5.good after-sale service TC-type step-up & down transformer is specially designed for such electronic ... are safe for use within the rated voltage range. st step-up down transformer