'The Unit' project group UNB have dropped a preview of their upcoming track 'Black Heart'.

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UNB previously revealed a dance battle clip of the members, and they've now shared a preview of "Black Heart", which sounds like a dance track with Latin inspiration. Ryan Jhun, who composed the track "Pick Me"�from season 2 of 'Produce 101', is the composer behind their upcoming song.

Check out UNB's "Black Heart" preview, and let us know what you think in the comments below!