A CPR training system comprises a plurality of CPR training manikins and at least one receiver unit, where each manikin comprises at least one sensor and a microcontroller connected to each sensor. The microcontroller is connected to a Bluetooth transmitter which is adapted to transmit the data from the sensors within a BLE advertising package to the at least one receiver unit. For the CPR training system there may also be provided a multi CPR monitoring device which comprises the receiver unit, a user interface, and a processor, where the receiver unit is adapted to receive CPR data from the transmitters as BLE advertising packages, the processor analyzes the received data, and the user interface shows the result of the analysis in a grid, where each grid cell represents the data from a respective transmitter.
