The range is good. On the Rx tab everything I do on the Tx reflects correctly on the tab. Thr, Roll, Pitch, Yaw, switches...All coincide exactly with what I'm doing on the radio. I have the qbrain all in one. (Skywalker Quattro) so not sure how to calibrate. It didn't work with the way I'm used to...No battery, full Thr, plug in battery, no Thr, etc.