I took my Bebop 2 with SC1 and SkyBoost out into the countryside in perfect conditions to test the maximum range.
I NEVER expected to be able to get to 4km and still have clear image on my screen, I could have kept going further but then spotted the battery charge % so immediately set RTH, RTH wasn’t going fast enough so I took over and tried to return as fast as I could. I panicked as I never thought I was going to make it so began looking for landing sights. Luckily I returned with a thud with 2-3% battery. I believe this is the absolute limit of what the Bebop 2 can achieve.
Booster purchased from here: