Digital tour-guide system Crystal Sound overview (ENG)

Let's tell you how the Crystal Sound radio guide system works, break down the technical specifications and features. the complete system (the headset, the microphone, the battery charger) the adjustment and startup Our website and us in social networks: https://crystal-sound.it https://www.instagram.com/crystalsoun... Tel: +39 366-358-62-74 email: hello@crystal-sound.it

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