These are designed for mobile devices; I don't recommend them for use with a desktop. I recommend the first gamepad: IPEGA Wireless Bluetooth Game Controller. It supports Android/iOS/PC and has a bunch of neat features.
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The video game emulation experience isn't complete without a USB gamepad! I recommend this gamepad: Logitech Gamepad F310 (it's not featured below because they don't allow product embedding). It's a nice, solid gamepad with a smooth grip and 11 buttons.
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