That's it! Rigid ultra light construction, on the Amazon picture the adjusters are wrong, they should be front to back. The Fc USB controller faces backwards, make sure you turn on the RPM filter and turn off the filters, but once programmed in Betaflight you don't need to use it. I fly mines on 450 4s and she weighs 159 grams. Super quiet, rulitsya amazing and fast. Get 2.5 minutes at race pace