Xtrem Inno Launches Instant Custom Case: 2.67-Inch Passive NFC E-Ink Smartphone Case
In July 2026, Xtrem Inno rolled out the Instant Custom Case, a battery-free NFC-powered E Ink smartphone cover for personalized device styling. Powered entirely by passive NFC energy harvesting, it requires no built-in battery or charging cables, and draws no standby power from the host iPhone.
Core Technical Advantages
- Zero-battery passive NFC operation Harvesting energy from standard NFC radio fields during transmission, the case needs no internal battery. It retains displayed graphics permanently even when detached from the phone or the device is powered off, with zero ongoing power consumption.
- High-quality 4-color E Ink Spectra display Equipped with a 2.67-inch circular E Ink Spectra panel, it supports black, white, red and yellow output with 400×400 resolution (212 DPI). With a 37% wider color gamut than standard tri-color e-paper, it delivers sharp text and smooth photo gradients with a paper-like viewing experience.
- Rugged build with MagSafe compatibility Made of high-strength PC and shock-absorbing TPU with an aluminum alloy camera frame, it features reinforced corners and 3mm raised edges for full drop protection. It is fully MagSafe compatible and works with standard wireless charging docks.
Key Specifications
The case fits iPhone 14 to iPhone 17 series (including Pro and Pro Max models) and comes in white, black and orange. It is priced at $69.99 for earlier models and $73.99 for iPhone 17 series versions.
Usage & Software Support
- Users can upload photos, graphics or memes via the G-SHELL app and refresh the display with one NFC tap, with proprietary algorithms optimizing content for e-paper rendering.
- Once refreshed, content stays permanently without a continuous phone connection, working as a standalone display unit.
- It supports the full MagSafe ecosystem, compatible with mainstream wireless chargers and accessories.
Typical Application Scenarios
- Personalized phone styling with custom photos, artwork and creative designs
- Quick-reference display for contact info, tickets and daily schedules
- Reusable badges for conferences, exhibitions and coworking spaces
- Customizable creative gifts for personal or corporate use
This passive NFC e-ink technology is also widely used in home and lifestyle products. Our VidaBay Snap E-Ink Fridge Magnet adopts the same core principle: all content updates are done via NFC tap from a smartphone, with no built-in battery and permanent display retention after each refresh.
