Neuron Spikerbox: Analog Box that allows you to connect to a computer or Smartphone using ONLY the Green Audio cable.

Neuron Spikerbox Pro: Digital Box that allows you to record from 2 channels, at the same time. You can connect it to a computer or a Smartphone with a USB cable. 

The difference between The DIY Neuron 2-channel and Neuro SpikerBox Pro - Pro does everything over USB and the DIY is only analog signals over the audio connection.

The 2 channels would need the blue AUX cable and an iMic to connect over 2 channels.

Also, we have an experiment that uses 2 channels where Neuron SpikerBox Pro comes in really handy. Check it out in the link below: