The Tacx ANT + / Bluetooth chest strap / heart rate Smart - for digital transmission of your pulse values using ANT + or Bluetooth Smart. (Dual Technology). Sends the data via ANT+ and Bluetooth to smartphone, tablet PC, sports watch, GPS device, bike computer or Tacx home car. Required version is Bluetooth 4 or higher. »I-Genius, Ironman, i-Vortex, Bushido, all Smart Trainers, Bushido Tablet.