Reflex Hammer Box of 3 Cockroaches or the cords break and

or the cords break and need to be replaced

and it teaches more about the nervous system in 60 seconds than a week of lectures

This compact

React to your own body signals

Reflex Hammer Box of 3 Cockroaches or the cords break andDelve into the world of reflexes with our Reflex Hammer a tool that unveils the exact speed of your body's hard wired responses. Record and analyze reflex arcs, such as the Patellar Reflex, with precision, measuring the time difference between the hammer strike and muscle contraction for a deeper understanding of your body's incredible reflexes. PLEASE NOTE: This is not a stand alone product. It requires the Human SpikerBox.