| Name | Honor Life S3 | Xteink X4 Pro |
|---|---|---|
| Image |  |
 |
| More views | - |    |
| MSRP | ~$60 | $99 |
| Released | 2026 | 2026 |
| Availability | Regional: CN | Available |
| Check price: | JD | Xteink, Amazon |
| Display specifications | ||
| Display type | E Ink | E Ink |
| Display size (inch) | 3.68 | 4.3 |
| Resolution (pixels W×H) | ? | 480×800 |
| Color display? | No | No |
| Pixel density | 259 PPI | 219 PPI |
| Screen light? | No | Yes |
| Adjust color temperature? | NA | Yes |
| Auto-rotate? | ? | ❌ |
| Input options & features | ||
| Touchscreen | ✔ | ✔ |
| Button controls? | ✔ 1× multifunction | ✔ Page-turn (next/prev page), Home |
| Stylus input | ❌ | ❌ |
| Dark mode | ? | ✔ |
| Audiobooks | ❌ | ❌ |
| Connectivity | ||
| Bluetooth | ? | ✔ |
| Wi-Fi? | Wi-Fi 6 | Wi-Fi 4 |
| Cellular network | ❌ | ❌ |
| Software | ||
| Operating system / firmware | Custom OS + companion app | Custom OS + companion app |
| Reading apps & e-book shops | TXT/EPUB reader | TXT/EPUB reader |
| Web browser? | ❌ | ❌ |
| Email app? | ❌ | ❌ |
| Dropbox & Google Drive? | ❌ | ❌ |
| Hardware specifications | ||
| Internal storage | 0.016 GB | 16 GB (on incl. SD card) |
| RAM | ? | 8.512 MB 8 MB PSRAM + 512 KB DRAM |
| CPU clock speed | ? | 0.24 GHz dual core (ESP32-S3) |
| Other built in: | Magnet, microphone | MagSafe magnet |
| Ports & battery | ||
| MicroSD card reader? | ✔ | ✔ |
| 3.5 mm AUX out port? | ❌ | ❌ |
| Other ports? | ❌ | ❌ |
| Battery capacity (3.7V) | 650 mAh | 1100 mAh |
| (USB) charging port | USB-C | Pogo pins |
| Physical specifications | ||
| Waterproof? | No | No |
| Size (cm H×W×D): | 10.06×6.64×0.56 | 11.1×6.9×0.595 |
| Weight (gram): | 61 | 72 |
| Size (inch H×W×D): | 3.96×2.61×0.22 | 4.37×2.72×0.23 |
| Weight (oz): | 2.15 | 2.54 |
| Screen: flush or recessed? | Flush | Flush |
| Color options: | White | Black, white/gray |
| Accessories in the box | Screen protector, magnetic ring | 16 GB microSD card, screen protector (matte), MagSafe ring stickers, magnetic charging adapter |
| More information | ||
| Model number | KET-RD00 | X4 Pro |
| User guide / manual | Not available | User Guide |
| Official site link: | Not available | Xteink.com |
| Brand origin | China | China |
| Check price & reviews | ||
| See price and reviews: | JD | Xteink, Amazon |
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