There's no harm at all. Its magnetic principle is the same as the magnetic charger, because the original iron inside the mobile phone is very little, the iron original is not the main original, the magnet does not have much impact on it, as long as it does not affect the use, it will not affect the performance.
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The surface magnetic force (the part that contacts the phone) of more than 200gs will affect or even damage the phone, but the magnetic force of the black shark magnetic heat sink back clip is far less than this standard, so it will not affect the phone.
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Under normal circumstances, the S pole or N pole of the magnet will have an impact on the phone, but the magnetic radiator does not rely on a separate N pole or S pole to attract the metal part of the phone.