The Canon EOS 90D camera has a lot of buttons and dials on the exterior of the camera body. Take a look at those on the top and back.
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FB LP E6 Dummy Battery AC Power Adapter Camera External Power Supply Set for Canon EOS 5D4 5D3 5D2 7D2 6D2 90D 80D 70D 60D R5 R6 - AliExpress
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Canon EOS - Wikipedia
