The FireBoard uses Bluetooth 4.0 (BLE). The official Bluetooth 4.0 spec provides very detailed information about the capabilities of the protocol.

FireBoard Labs has performed field testing, resulting in the following findings:

FireBoard requires that your mobile device is equipped with Bluetooth 4.0+ hardware and runs either iOS or Android. To use FireBoard on your Apple product, make sure your device is one of the following, with iOS11 (watch OS5.2) or later:

To use your FireBoard on an Android device, make sure your device is an Android 5.0 or later and is equipped with a Bluetooth 4.0+ radio.