1. Download driver from Yihi website http://yihisxmini.com/support/000003002003.html .
File name: SXi-v220.127.116.11-Setup-20180611-1445-English
Install it in your PC and then click Connection to install Driver
2. Download latest firmware in our website https://shop.steamcrave.com/hadron220_p1010.html
3. Turn off and remove battery out of device
4. Remove your atty from device
5. Connect USB cable to PC
6. Open SXi - Upgrade - Open file - upgrade
Version A：Lock adjust buttons only, fire button still working
1) To clear puff counter manually. Press & hold + button for 1.5 seconds (Puff counter won’t reset after changing batteries).
Also includes puff counter to count as a 1 second puff.
2) To enter bypass mode: Press & hold - button for 1.5 seconds.