it all depends on how low and what your flying through, behind or near. RSSI is more important than anything else, next i want my flight pack voltage, after that it's bells and whistles. You need a mictronics type converter for the osd pro, there new eagle tree osd that also has fully integrated multirotor flight controller and 4 types of rssi inputs has it built in. It's about a year late, but i'm a big eagle tree fan of how there guardian flies and my success in long range fpv with wings. Love there stuff, osd pro was based on planes, from here on out there including multi's