Backers can add $15 dollars for a Gemini sleeve, $90 for Gemini UHD Touchscreen upgrade service.
Here's how to do it:
1. Press the “Manage Your Pledge Button” above.
2. Increase your pledge in the pledge amount box by $15 or $90.
3. After the end of the Kickstarter campaign, you will receive a survey that asks you questions so that you could tell us which item or services you pledged.