The First Aid CPR Ezy Kit enables you to perform more effective CPR in an emergency and is a great training aid too. It has been exhaustively tested by a number of well-known medical organizations throughout the world and has undergone a full clinical trial in St Vincent Hospital in Melbourne, Australia. The clinical trial clearly proved that external heart massage using the CPR Ezy chest compression pad was up to 5 times more effective than using traditional manual CPR methods.The emergency CPR Ezy kit features an LEF force indicator for consistent chest compression. This medical instrument guides the rate of chest compression with an audible tone and it's also a practical aid for CPR training.