Shaw has to say and show. There are 4 heating elements, the size of an average male palm. Located in the middle. Data for consumption calculation-in the photo. On Red mode 1,8 A, on blue-pulsation change every 3 seconds about 1,8 by 0,5 A, on green too change about 3 seconds-from 1,8 to 0,02 A. That is, on reduced heating there is a cyclic change of current. The power supply of the bank is calculated by yourself.