? You've actually had independent testers confirm that your BT-Q818 eXtreme is the most powerful GPS receiver on the entire planet? We're guessing not, but for what it's worth, the second incarnation
of the BT-Q818 features 51-channel tracking, 32-hours of navigation time, -158dBm sensitivity, USB connectivity, built-in Bluetooth, adjustable 1 to 5Hz update rate and a 36-second signal acquisition time (when cold). Sounds pretty run-of-the-mill from here, but QSTARZ wouldn't fib about this thing's world ranking, now would it?