1. Download driver from Yihi website http://yihisxmini.com/support/000003002003.html .

  File name: SXi-v2.8.6.6-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.