cprCUBE is a Hands-only CPR training aid which will help anyone master the process of chest compression without the use of expensive CPR manikins. cprCUBE makes learning hands-only CPR fun by using immersive education through visual, auditory, and tactile feedback. A first aid training site can be anywhere you like with the cprCUBE. Just open the box and expand it. CPR can be learned whenever and wherever you want.