Yoyos are used in turnstile systems and smart card access systems, on waist or neck straps. They allow for a more stylish and flexible use of cards. Thanks to their internal mechanism, yoyos can extend approximately 50 cm, preventing the user from bending down or removing the card from their neck when the reader is at an inappropriate distance. These accessories can be attached to the neck or pocket, often serving as an alternative to neck straps or clip-on holders and card cases.
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