Seminer typec-usb-2in1 USB-C OTG Adapter with 100W PD and USB 3.0
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Product description
The USB 3.0 port lets you connect a USB-A peripheral while the separate USB-C port charges your device, making the Seminer OTG adapter useful when you need both connections at once. It supports charging up to 100W and data transfer rates of up to 10Gbps through USB 3.0.
For example, you can connect a USB stick to a compatible device while keeping it connected to a charger. The adapter is designed for everyday connections with phones, tablets, laptops and Google TV Chromecast devices.
What you’ll notice day to day
The two-port layout brings charging and peripheral connectivity together in one compact adapter. Plug a USB-A keyboard, mouse, USB stick or game controller into the USB 3.0 port, while using the USB-C port for charging. This can be handy at a desk, when travelling with a laptop, or when using a compatible Chromecast with a USB accessory connected.
The USB 3.0 connection supports transfer rates of up to 10Gbps, so it is suited to connecting compatible data peripherals as well as input devices. Buyers mention using the adapter with Chromecast and appreciate its compact size. Feedback on connectivity is mixed, however, and some buyers raise concerns about durability and charging performance. The stated charging support is up to 100W, actual charging also depends on the connected device and power supply.
Quick overview
- Type: USB-C OTG adapter
- Ports: 1 USB-C PD charging port and 1 USB 3.0 port
- Charging: Up to 100W (20V 5A)
- USB 3.0 transfer rate: Up to 10Gbps
- Weight: 0.01 kilograms
- Model: typec-usb-2in1
Usage tips
Connect the adapter to a compatible USB-C device, use the USB 3.0 port for a USB-A peripheral, and connect a suitable charger to the USB-C port when charging is needed. The USB-C port on the adapter is dedicated to charging: it does not synchronise USB-C devices or output video. This distinction helps when choosing which port to use: USB-A peripherals connect through USB 3.0, while USB-C is reserved for power.
It’s a good fit if you want to combine charging with a USB-A connection rather than carry separate adapters for those tasks. Listed compatible devices include iPhone 15, iPad, MacBook, Samsung Galaxy Tab, Samsung Galaxy S20, S22 and S23, Note10, Pixelbook, Google Pixel 5 and 6, Google TV Chromecast and Surface Book. Check that your device has a USB-C connection and supports the intended use.
Practical questions
Can the USB-C port transfer files or send video? No. The adapter’s female USB-C port is for charging only, it does not synchronise USB-C devices or output video.
What can I connect to the USB 3.0 port? It is designed for USB-A peripherals, including keyboards, mice, USB sticks and game controllers. The port supports transfer rates of up to 10Gbps.
Which devices is it listed as compatible with? The listed devices include iPhone 15, iPad, MacBook, Samsung Galaxy Tab, Samsung Galaxy S20, S22 and S23, Note10, Pixelbook, Google Pixel 5 and 6, Google TV Chromecast and Surface Book.
Is it worth it?
Choose the Seminer adapter when the practical need is to charge a compatible USB-C device and connect a USB-A peripheral at the same time. Its combination of a dedicated charging port, USB 3.0 connectivity and support for charging up to 100W makes it a useful option for compatible mobile devices, laptops and Chromecast setups.