This is a real product you can buy – no study or fake.

The Freedom Dynamo Electric Shaver provides true liberty through its Wind ‘N Go lever, avoiding any need to use actual electricity. One minute of winding, and you’ve got yourself enough power for a full shave! It also comes with three individual heads that properly flex and rotate to provide a close and precise performance. And for any on-the-go users, it comes with a travel case, which includes a mirror, cleaning brush and adapters.

More info: Dynamo Electric Shaver

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