Pad has a resistance of 1.6 Ohm for 12 V and 2.9 ohm for 24 V.
The pad consumes at 12 V 7.5 and 24 V 8.3 and - necessary to have a proper powerful source.
Pad is not a separate functional total - requires professional assembly. The board is supplied clean - i.e. without cable, diodes and resistance.