Hyperice Core Premium Bundle Meditation Training System 3-1/2 X 3-1/2 X 3-1/2 Inch (1235912_EA) 1/EAA smart device and app with meditation and breathing training content that helps you find your Zen Biosensors (2 electrode electrocardiogram) listen to your heart rate and sends data to the Core App over Bluetooth. Carefully designed vibration motor and a ring of lights guide you The tactile feel of vibrations will get you into your physical senses. Vibrations will also guide you on when to inhale and exhale.