Transmit heart rate to your smartphone and sports watch simultaneously, using this water-resistant sensor with a reliable range of up to 10 meters. Its dual technology makes it possible to link to more than one device simultaneously. Compatible with devices that have ANT+ or Bluetooth Smart* / Bluetooth 4 and higher. *If you have a different Bluetooth version and you want to link the Tacx sensors to your smartphone or tablet, you can use a receiver developed specially for that purpose. For an Apple (iPhone) device, use the Wahoo ANT+ dongle. For devices with a micro USB port, use the Tacx ANT+ Dongle micro USB.