Black Lexar Dual-Slot USB-A/C Reader seen from above, with a textured grip, a white Lexar logo, a USB-A plug under a clear cap at the left end and a USB-C plug under a clear cap at the right end

Lexar Dual-Slot USB-A/C Reader

A pocket reader with a USB-A plug and a USB-C plug, for SD and microSD UHS-I cards. Lexar's 205MB/s figure is higher than the SD Association's 104MB/s UHS-I bus maximum, and Lexar says results depend on the card.

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Compatibility report
Lexar part LRW310X-BNBNG, global version. Black stick-shaped reader with a USB-A plug at one end, a USB-C plug at the other, one SD slot and one microSD slot.

What works. What doesn't.

Not yet verified

iPhone support

Lexar's product sheet says the reader connects to laptops, tablets or phones, but its supported-systems list names only Mac OS 10.8 or later and Windows 11/10/8/7/Vista/XP with a USB 2.0 or newer port. No iPhone model or iOS version is named.

Manufacturer documentation

With limitations

Speed

Lexar lists up to 205MB/s and says results vary with system configuration and card speed. Its sheet mentions that speed alongside its SILVER PLUS cards. The SD Association lists 104MB/s as the UHS-I bus maximum, and Lexar does not explain how the reader goes past that. The reader is compatible with USB 3.1 and 2.0 ports, and a USB 2 port limits it to 480Mb/s.

Manufacturer documentation / Source checked 2026-11-09
Lexar: Lexar Dual-Slot USB-A/C Reader product sheet

With limitations

Storage media

SD, SDHC, SDXC, microSD, microSDHC and microSDXC cards, with UHS-I support. Lexar does not list UHS-II, so a UHS-II card would be limited to its UHS-I mode.

Manufacturer documentation / Source checked 2026-11-09
Lexar: Lexar Dual-Slot USB-A/C Reader product sheet

Not yet verified

Power

Lexar does not publish a power draw. The sheet describes plug-and-play and hot-plug support with no drivers needed. There is no charging port.

Manufacturer documentation

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