4-Port USB Backplate
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The 4-Port USB Backplate is exactly what it sounds like. It attaches flush to the rear side of the Raspberry Pi Zero W and allows you to attach up to four USB 2.0 devices.
This is a great choice if you're using a microcontroller to manage your inputs, since it also allows you to use a USB sound card for your audio and give your device an external USB port which can be used for things such as keyboards and memory sticks.
Please note that this follows the FE1.1s standard, which means that mixing different speeds of devices could cause High speed devices to down-clock to Full speed, or possibly result in an incompatibility.
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