Yes, the Cetus X FPV Kit drone is suitable with the BT2.055mah battery. If you have other questions, please contact us in time. 

This Cetus X Drone is the Betaflight FC, if you have other questions, just feel free to contact us. 

Hello dear customer, thank you for your support. Yes, this Cetus X FPV drone kit has altitude hold. If you have any other questions, just contact us in time. Beautiful day 

Mmmm maybe 25 to 30 not fast but this drone is very good for beginners. I bought it for my son, it was his first FPV drone. 

Hello dear customer, thank you for your support. The Cetus X FPV kit can fly about 600m in wide and interference-free environments. If you have any other questions, please feel free to contact us. Beautiful day. 

Hello dear customer, thank you for your support. Yes, the Cetus X FPV Kit drone is suitable with the BT2.055mAh battery. If you have other questions, please contact us in time. Best regards. 

No. There is no room for temples, as the glasses must fit snugly to block out ambient light. I've ordered some welder cheats and plan on narrowing them down and see if they work. I wear +2 diopter reading glasses, but that doesn't seem to be enough, so I may have to experiment a bit. The sweat funnels are 4.25 x 2.5 inches. The aperture is about 4x1.75. I'll get the plastic cheats, cut them off and see if I can fix them inside with some hot glue to make them usable. Higher-end glasses come with built-in diopters, but the glasses alone are three times the price of the entire set. 

Hello dear customer, thank you for your support. Yes, the goggles in the kit can be used with other drones which are analog versions. If you have any other questions, please feel free to contact us. Beautiful day. 

Hello dear customer, thank you for your support. This Cetus X drone is the Betaflight FC, if you have any other questions just contact us. Nice day.