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✅ [YOBYBO 4th Generation] Introducing the latest model in 2022 from designer earphone brand YOBYBO Japan! We have improved the functionality of CARD20, the world's thinnest class of wireless earphones. A new model with a major upgrade has finally arrived! ✅ [What is YOBYBO Japan? ] This is an audio brand with the brand concept of "innovation" and "creativity". We succeeded in collecting over 200 million yen in support through crowdfunding, which started prior to the public release. We created the concept of designer earphones for the first time in Japan. It was designed based on ergonomics by a team of American designers, and the first and second generations won design awards from around the world (Red Dot Award, iF Design Award, etc.). We aim to be a brand that gives you status in and of itself. ✅ [New world's thinnest earphones] Weighs only 3.5g. It's only 1.3cm thin. Please feel the "invisible presence" that will make you forget that you are wearing it. In pursuit of miniaturization and light weight, the design is designed so that even those with small ears won't have any pain in their ears even if they wear them for long periods of time. The thin earphones are extremely easy to use. Compact design that can be stored in small pockets or wallets. The innovative and unique skylight design is a design that satisfies the owner's desire to own it. It can be used for both sports and work. ✅ [Bluetooth connection is poor] The previous CARD20 was a product that thoroughly pursued the "thinness and lightness" of the casing, so the strength of the Bluetooth connection was cited as an issue. In "CARD20 Pro", the installed chipset is upgraded from QCC3020 to QCC3040! Also, the Bluetooth standard has been upgraded to v.5.2! It also supports Qualcomm TrueWireless Mirroring, allowing independent reception on the left and right sides. Connection stability has been greatly improved. ✅ [Audio manufacturer's commitment to high sound quality] Compatible with high sound quality codec apt-X & Hi-Fi stereo codec AAC. Equipped with the world's thinnest 13mm dynamic driver. Reproduces powerful, balanced sound quality with clear central range. You can enjoy clear and high resolution sound. ✅ [Reliable after-sales service provided by a Japanese company] We offer a 1-year replacement warranty from the date of purchase. If you have any problems, please feel free to contact us as our Japanese staff will assist you. [Built-in microphone] Also equipped with CVC noise canceling. Conversation is possible with clear sound quality. Perfect for telework, remote work, web conferences, etc. It also supports touch controls and more for a seamless hands-free experience. [Included items] CARD20 Pro main unit, charging USB cable, Japanese instruction manual [Body size] 8.4cm x 3.5cm x 1.3cm If you are unable to register on the official LINE using the included card, please register on the YOBYBO official website.