Bluetooth Low Energy
The TrueTrainer uses Bluetooth Low Energy, or BLE for short.
If your device has built-in bluetooth connectivity, it will most likely work perfectly fine with the TrueTrainer.
Some USB Bluetooth adapters lack this BLE connectivity however, so it might be a good idea to check with the manufacturer of your adapter.
The TrueTrainer is also equipped with ANT+. This is often found on sports-specific watches or bike computers, but rarely on laptops and phones. To use this feature on those devices, you'll need an ANT+ dongle.
All TrueTrainer contain Wi-Fi connection for updates and synchronizing activities. Depending on the model (TrueTrainer Max and 6.2), the TrueTrainer possesses 'Zwift over Wi-Fi' for connecting Zwift via Wi-Fi.
Should I use BLE, ANT+ or WiFi?
In general, Wi-Fi and ANT+ provide a more stable connection. On top of that it's capable of pairing with multiple devices simultaneously. This means you can use a cycling computer while connected to a program like Zwift.
Bluetooth has the advantage when it comes to accessibility. Nearly all laptops and phones have integrated BLE receivers, so you can start cycling right out of the box, no adapters needed.