Imo the X2 and Kishi are overrated. I've owned both and returned both. Unless your phone has a bad Bluetooth reciever the input lag is near absent.

Save yourself the money and get a flydigi. Battery life is crazy. It auto shuts down. Connects near instantly. Light weight. Portable. Allows as much room for cases as the competition.

If $40 off Amazon is too much then dig on some other sites. It's been available for a long time. You are likely able to find it cheaper. Edit: just saw a separate comment that you are in Brazil. I would still search this Controller out. If you've got any access to aliexpress, look there as well. I added a 2nd link for it.

Bounabay Wireless Telescopic Bluetooth Controller Gamepad for Android System, Stretchable PUBG Mobile Game Controller with Flymapping Technology, More Games Enabled https://www.amazon.com/dp/B06XKSNCTM/ref=cm_sw_r_apan_glt_fabc_B6EE4W21FDP98CXMPAKB

https://m.aliexpress.com/item/1005002758809469.html?spm=a2g0n.productlist.0.0.481c2b2cD6lt4L&browser_id=3a24793965404ebaab2b639c7bb3f121&aff_trace_key=&aff_platform=msite&m_page_id=17c77c2a4a918aff5daf16fff8119101f9a78a355c&gclid=

I'd rather recommend a Daqi or Bounabay, due to, like u/TheToonWolf mentioned, the volume/power buttons.