(Only available for USA) 

 Firmware upgrade:

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 version SX490_20200801
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.

SX490_20200801-1126_V1231-LockedFreeFire.zip

Version B：Lock all buttons, you cannot fire and vape when locked

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.

SX490_20200801-1121_V1230-LockedNoFire.zip

Firmware upgrade:

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
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

Version A- Hadron upgrade firmware.zip

((Preinstalled version is A)

Version B：Lock all buttons, you cannot fire and vape when locked

Version B- Hadron upgrade firmware.zip