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Headphone Amplifier Portable 3.5 mm Audio Amp with Lithium Battery for MP3, MP4, Tablets， Smart Phone, Digital Player, Computer PC?

Headphone Amplifier Portable 3.5 mm Audio Amp with Lithium Battery for MP3, MP4, Tablets， Smart Phone, Digital Player, Computer PC

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A total of 1 review of this product on Reddit.

Huh. Aren’t there <$50 items out there that do the same?

Headphone Amplifier Portable 3.5mm Audio Amp with Lithium Battery for MP3, MP4, Phones, Digital Players, Computers https://www.amazon.com/dp/B085RW5HPG/ref=cm_sw_r_cp_api_i_AvblFbP3DKZHC