iPhone Duo’s USB-C port supports USB 3 at up to 10 Gb/s and DisplayPort output, according to Apple’s tech specs. That puts it in the same class as iPhone 18 Pro for wired transfers and about 20 times faster than the USB 2 port on iPhone 17 and iPhone Air.
The port also handles charging, with Apple rating the phone at 50 percent in around 20 minutes from a 60W-capable adapter, and it will be the connection for Apple Pencil (USB-C) when that support arrives later in 2026. Here is what Apple has published, what each figure means, and where the gaps are.
Key facts
| Item | iPhone Duo | Source |
|---|---|---|
| Connector | USB-C | Apple’s tech specs |
| Data speed | USB 3, up to 10 Gb/s | Apple’s tech specs |
| Video output | DisplayPort | Apple’s tech specs |
| Wired charging | Up to 50 percent in around 20 minutes with a 60W-capable adapter | Apple’s tech specs |
| In the box | iPhone with iOS 27, USB-C Charge Cable (1 m); no adapter | Apple’s tech specs |
| Apple Pencil | Apple Pencil (USB-C), both displays, support later in 2026 | Apple’s press release |
| Physical SIM | None; eSIM only worldwide | Apple’s tech specs |
USB 3 at 10 Gb/s: what moves faster
USB 3 at 10 Gb/s is the same data rate Apple lists for iPhone 18 Pro, iPhone 18 Pro Max, iPhone 17 Pro and iPhone 16 Pro. It matters most for moving large video files. iPhone Duo records 4K Dolby Vision at up to 120 fps, plus 4K slo-mo at 120 fps and Dual Capture at 4K 30 fps, and a wired transfer to a Mac or an external SSD is where a 10 Gb/s link saves real time over the 480 Mb/s of USB 2.
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One caveat: Apple’s tech specs do not list ProRes, ProRes RAW or Apple Log 2 for iPhone Duo, so the external-recording workflow Apple offers on iPhone 18 Pro, which records ProRes up to 4K 120 fps to an external drive, is not something Apple has promised for the foldable.
DisplayPort: driving an external screen
Apple lists DisplayPort under the Duo’s USB-C connector, which means the port can send video to an external display or a USB-C monitor. The phone’s own inner panel is already a 7.6-inch display at 1878 x 2670 pixels.
What Apple has not published is any maximum resolution or refresh rate for external output, whether the output mirrors the inner or outer display, or whether the phone offers an extended-desktop mode. Until Apple documents it, treat anything beyond basic output as unconfirmed.
Charging, and what you can plug in
Apple rates iPhone Duo at up to 50 percent in around 20 minutes with a 60W-capable USB-C adapter, which is five minutes slower than the 15-minute claim for iPhone 18 Pro with the same class of adapter. The alternative is 50 percent in about 30 minutes with a 35W adapter plus MagSafe, and MagSafe and Qi2 both top out at 25W. Apple does not include an adapter in the box, only the 1 m USB-C charge cable. Our guide to how to charge iPhone Duo fastest walks through the options.
iPhone Duo vs the rest of Apple’s lineup on USB-C
| Model | USB-C data speed | DisplayPort listed | Wired charge claim |
|---|---|---|---|
| iPhone Duo | USB 3, up to 10 Gb/s | Yes | 50 percent in around 20 min, 60W adapter |
| iPhone 18 Pro / Pro Max | USB 3, up to 10 Gb/s | Not in the figures we have | 50 percent in around 15 min, 60W adapter |
| iPhone 17 Pro / Pro Max | USB 3, up to 10 Gb/s | Not in the figures we have | 50 percent in 20 min, 40W adapter |
| iPhone 16 Pro | USB 3, up to 10 Gb/s | Not in the figures we have | Apple has not published |
| iPhone 17 | USB 2, 480 Mb/s | Not in the figures we have | 50 percent in 20 min, 40W adapter |
| iPhone Air | USB 2, 480 Mb/s | Not in the figures we have | 50 percent in 30 min, 20W or higher adapter |
The table shows the split in Apple’s range: the Pro models and iPhone Duo get USB 3, while iPhone 17 and iPhone Air stay on USB 2. Apple’s Duo spec sheet is the only one in our figures that spells out DisplayPort by name, but that is a gap in the data we have rather than proof the other phones lack it.
- An external SSD or a Mac, for 10 Gb/s file transfers. The included cable is described by Apple only as a charge cable, so a USB 3-rated cable is the safe choice for data.
- A USB-C display or a DisplayPort monitor with a USB-C cable, for video output.
- A 60W-capable USB-C adapter, sold separately, for the 20-minute charging claim.
- Apple Pencil (USB-C), once support ships later in 2026; see Apple Pencil support on iPhone Duo.
Wireless connections, Wi-Fi 7, Bluetooth 6, Thread and Ultra Wideband, are covered in our guide to iPhone Duo’s wireless connectivity.
What Apple has not said
- The maximum resolution and refresh rate of DisplayPort output, and whether it mirrors or extends.
- Whether the 1 m cable in the box supports USB 3 data speeds or only charging.
- Whether iPhone Duo supports external ProRes recording of any kind.
- Which USB-C adapters beyond the 60W and 35W examples hit the stated charging times.
iPhone Duo pre-orders open Friday, October 16 at 5 a.m. PT, with availability from Friday, October 23. It starts at $1,999 for 256GB and runs to $2,199, $2,599 and $3,199 for 512GB, 1TB and 2TB. For the full sheet, read our full iPhone Duo specs rundown.
