This comes with the Essentials kit unless you purchased prior to the addition. The Spiro is a one of a kind spinning LED attachment. It is often used as an extra head during QRI reflex integration sessions. The Spiro helps cut down session times and gives it more depth. It also helps in speeding up the healing and integration process and often calms hyperactive or anxious children. It comes with its own Spiro Balance protocol, which helps rejuvenate the body and move on from a plateau.