Spooky puts out between +/-7V to +/-20V for Contact use. It is generally accepted that skin resistance is somewhere around 200,000Ohms. To get current, divide Volts by Ohms, which equals 70microAmps to 200microAmps.
Of course, this depends on the actual skin resistance for the individual and the actual Amplitude Setting in Spooky2.
This will only be for Contact mode, as Remote and Plasma neither generate current in the body.
For more details, please check the link: