Seminer 1in2-dual-typec-gray USB-C OTG Adapter with 100W PD and 10Gbps

Best use cases

Connect a USB-C peripheral to your phone or tablet while keeping a charging connection available with the Seminer USB-C OTG adapter. Its two ports are designed for different jobs: one supports USB-C PD charging, while the other handles USB-C 3.1 data.

That split is useful when a single USB-C connection needs to serve more than one purpose. For example, you can connect a compatible peripheral through the data port and use the PD port to charge your device at the same time.

If your priority is only charging, a single-purpose cable may be a simpler fit. This adapter is aimed at a different need: combining charging and a USB-C accessory connection in one compact splitter.

What stands out

The PD port supports charging up to 100W (20V 5A), while the USB-C 3.1 port supports data transfer rates up to 10Gbps. Keeping these functions on separate ports makes it easier to choose the right connection for each task, use the port markings to identify the charging and data connections.

The listed compatible devices include iPhone 15, iPad, MacBook, Samsung Galaxy Tab, Samsung Galaxy S20/S20+/Note10, Google Pixel 6/5, PixelBook, Google Chromecast with Google TV and Surface Book. It also supports listening to music and taking calls with headphones and online controls, giving it a role beyond charging and file transfer.

Buyer feedback highlights the adapter’s versatility and build, with some appreciating the ability to use headphones and power together. Reports on operation and charging are mixed, so feedback reflects different experiences rather than a consistent result for every setup.

What matters most

The key choice is whether you need both charging and data access from a USB-C connection. For a compatible phone or tablet, the separate PD and data ports can help when you want to keep power connected while using a peripheral. For a MacBook or another listed device, the data connection can also be useful for attaching a compatible USB-C accessory.

The adapter is finished in grey with a matte surface. Its purpose is straightforward: retain a USB-C charging connection while making another USB-C port available for data or supported headphone use. Check the port labels when connecting devices, as the charging and data functions are assigned to different ports.

Practical questions

What does the adapter’s two-port design provide? It has one USB-C PD charging port and one USB-C 3.1 port for data, allowing charging and a suitable peripheral connection to be used together.

How fast can it charge and transfer data? The PD charging port supports up to 100W (20V 5A), and the data port supports transfer rates up to 10Gbps. Actual charging also depends on the connected device and power source.

Which devices are listed as compatible? The list includes iPhone 15, iPad, MacBook, Samsung Galaxy Tab, Samsung Galaxy S20/S20+/Note10, Google Pixel 6/5, PixelBook, Google Chromecast with Google TV and Surface Book. Check that your device uses a compatible USB-C connection for the function you need.

When it makes sense

Choose the Seminer splitter when you want a charging port and a separate USB-C data connection available from one adapter, rather than a charging-only accessory. Its combination of up to 100W PD charging, 10Gbps data transfer and support for headphones makes it a practical match for compatible phones, tablets and computers used with more than one USB-C accessory.