Setanta device acts as a flow of electricity by both DC and AC power. If the resistance to an electric current flows through the resistor is less. If the resistance to an electric current flows through the resistor can be huge.
The device serves to Tan the flow of electricity by using both DC and AC power. If the resistance to electrical makkrasae is flowing through the resistor. If the resistance is less electricity is flowing through the resistor.
As a device to the eyes, and the flow of electricity, using both direct current and alternating current resistance if more current to flow through resistor if the resistance is at least current will flow through the resistor.