No, it's not required. We made all the labs done efficiently with the Remote Lab Kit units.

The experiments are based on reaction time depending on what you see and hear Eg. students can measure reaction time depending on their reaction to green/red light (reacting only to green or red/reaction to green and ignoring red etc), or what they hear (low or high sound, also reacting to one and ignoring the other) and the combination of both light and sound.

Note that the Reaction Timer is an expansion product for Muscle SpikerBox Pro. Couple of different experiments can be done with this product, and you can check it out on this page -