PC Magazine has a review of the Plantronics Discovery 655 and writes - “Unlike the 510, which is rather large but very comfortable, you’re barely aware that the 655 is fitted to your ear. Since it lacks the 510’s curved shape and vise-like grip, the 655 moves around a bit more easily, though there’s an attachable plastic ear hook in the box to alleviate this problem. The Plantronics 655 never fell out of my ear during testing (even without the hook attached), something the tiny Samsung WEP200 is prone to do. The 655 did feel a little loose at times, particularly when walking up and down staircases.”

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