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【Voltage Compatibility】
When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.
【Plug Type】
Our products use Japanese plug types (A or B type).
Please use a conversion adapter if necessary.
【Important Note on Transformers and Adapters】
A transformer adjusts voltage to match your device’s requirements.
A conversion adapter only changes the plug shape and does not adjust voltage.
Using only a conversion adapter without a transformer may result in damage to the product.
【Liability】
We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.
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🎶 New model for 2025: Small! Light! Great sound! The popular wireless earphones "COTSUBU," which have shipped over 300,000 units, now come in new colors. The sound quality is now even clearer, and a new multi-point function has been added.
🎶 Ultra-compact and ultra-lightweight: The earphones themselves are the smallest and lightest in the series, weighing approximately 3.5g per earphone. They're so light you'll forget you're wearing them. They fit snugly in any ear, so they're less likely to pop out of your ears, and there's no risk of them falling out when touching your earphones or putting on or taking off a mask. In addition, the "deep fit design" allows them to fit securely in your ears despite their small size, achieving high sound insulation despite the lack of active noise canceling.
🎶 High-quality sound specifications supervised by audio brand final: Wireless earphones often don't focus on the speaker itself, relying heavily on software equalizers to adjust sound quality, especially in the high-frequency range, which can be tiring to listen to. To avoid this, many products are unbalanced, with excessive bass emphasis. The COTSUBU MK2+ focuses on the acoustic characteristics of the speaker to ensure sound quality that's satisfying even without a software equalizer, and then uses a subtle equalizer to correct only the annoying high-frequency issues caused by Bluetooth. Renewed internal acoustic components improve sound clarity compared to the original COTSUBU, allowing you to enjoy vocals and instruments more clearly than ever before.
🎶 New "Touch Operation Disable Function": The earphones themselves support touch operation, allowing you to play/pause music and answer/end calls more easily. Furthermore, tapping five times in a row will activate the "Touch Operation Disable Function," disabling any further touch operations. This not only prevents accidental touches of the earphones, but also turns off announcement sounds and LED lights, making it ideal for when you want to concentrate on the content for longer.
🎶 New "Multipoint" feature: Supports multipoint connection, allowing up to two Bluetooth devices to be connected simultaneously. Connect two devices at the same time and seamlessly operate each one without having to switch between them. For example, you can pair your PC with your smartphone and listen to music on your PC while receiving calls on your smartphone.
🎶 Package contents: COTSUBU MK2+, charging case, earpieces final TYPE E for TWS - SS/S/M sizes, USB-C charging cable, instruction manual, 12-month warranty, customer support. *Product packaging may change without notice. Please note that depending on the time of purchase, the product may be delivered in a different package. There is no difference in the product itself.
Weighing just 3.5g per earphone! Introducing the ultra-compact and ultra-lightweight "COTSUBU"! True wireless earphones that offer everything from sound quality to connection and ease of use. Winner of both the Grand Prize and Gold Award at the VGP 2021 Summer Special Awards, Japan's largest audio-visual awards.
