Installing the pushbullet 2FA module is very simple. The following steps will guide you through the process:

1. Unzip the contents of the zip file to a folder on your computer
2. Upload the entire files in the 'upload' folder to your website - if you experience problems, try uploading in binary mode
3. Login to admin area and go to Configuration () > System Settings > Two-Factor Authentication
4. Activate PushBullet Two-Factor Authentication
5. Configure OTP code length and OTP code valid
6. Save changes