fullspectrum After you make sure the USB cable you are using is for data and not just a charging cable try completely turning your computer off and then back on. Try to connect again. If this doesn't work search Impulse RC driver fixer and download that and run it. Then try to connect.

fullspectrum 1750kv is more for a 6s quad. Use motors around 2400kv for 4s. You could use the 1750kv with a 6s battery but you may want a throttle limit of about 80-90 percent in betaflight to protect the 35amp esc's as 35amps is a little low for a 6s quad.

fullspectrum You can use LHCP antenna's but you need LHCP on goggles and LHCP on the VTX. Most analog use RHCP and digital systems use LHCP.

fullspectrum Yes you can use Flysky but you will need the "PnP" version of the quad that has no receiver attached and then solder your own Flysky receiver on. Or you could just buy the cheapest Bind N Fly (Bnf) version and remove the attached receiver. But to be honest you are best to just spend some extra money and get a radio with built in ExpressLRS (Elrs) like the (Radiomaster Zorro Elrs, Jumper TLite Elrs, Radiomaster TX12 Elrs, Iflight Commando ELRs or Radiomaster TX16s Elrs)... and attach an Elrs receiver or buy the Elrs version of this quad. I have Flysky and I have moved to Elrs because you will never ever lose contact reception with your quad and you can fly much further. Elrs is cheap and is the way of the future.

fullspectrum No.. it is for a HDzero SharkByte digital goggle receiver only.

fullspectrum Get a Flysky mini receiver that has SBUS protocol to work with this drone.