Switch 1 - One 4mm plug for an electrode wire. One 3.5mm plug with 2 electrode wires.
Switch between them or combine them.
Detailed info coming soon.
To Use - Plug a wire going to an electrode into Switch 1, Plug a 3.5mm cable in and plug it into to electrodes.
Left is A, Right is B, and Center is A+B
This will change your sessions.