Custo Cardio 100/110 BT is the innovated version of Custo Cardio 100/110 that comes with a rechargeable battery. It is also equipped with Medical Bluetooth that is used for ECG transmission through wireless connection. The Custo Cardio 100/110 BT does not need any cables to be connected to the computer and considered as one unit with the patient thus it is very efficient when used during threadmill stress tests.