A portable electronic device including a first body having a first pair of opposing sides, a second body having a second pair of opposing sides, the second pair of opposing sides being in slidable engagement with the first pair of opposing sides to move the first body from a first position to a second position, and a magnetic unit located adjacent at least one side of the pair of opposing sides of the first body and at least one side of the pair of opposing sides of the second body. Further, the magnetic unit is configured to generate a magnetic force to bias the first body toward one of the first position and the second position.