【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.
🎶 2025 New model: Small! light! Good sound! The popular wireless earphone "COTSUBU", which has shipped over 300,000 units in total, has a new color. The sound quality is even clearer, and a new feature, multipoint, has been added.
🎶 Ultra-compact and ultra-lightweight: The earphones are the smallest and lightest in the series, weighing approximately 3.5g on each side. It's so light and comfortable that you'll forget you're wearing it. Since it fits perfectly in any ear, the earphones will not easily pop out of your ears, and you won't have to touch the earphones when putting on or taking off the mask and cause them to fall out. In addition, the "deep fit design" allows the earbuds to fit securely in the ear despite their small size, achieving high sound isolation even though they are not equipped with active noise canceling.
🎶 High-quality sound specifications supervised by the audio brand final: The sound quality of wireless earphones often does not focus on the speaker part, and they rely heavily on software equalizers to adjust the sound quality, which can easily cause ``listening fatigue'' especially in the high frequency range. In order to avoid this phenomenon, many products are currently unbalanced, with bass being overemphasized. For the "COTSUBU MK2+", we have pursued the acoustic characteristics of the speaker so that the sound quality is satisfactory even without the use of a software equalizer, and we have adopted a method of slightly correcting only the high-frequency areas caused by Bluetooth using an equalizer. By renewing the internal acoustic parts, the clarity of the sound has been improved compared to the first generation COTSUBU, and you can enjoy the sounds of vocals and instruments more clearly than ever before.
🎶 Equipped with a new feature "touch operation disable function": The earphones support touch operations, making it easier to play/stop music and make/end calls. Also, if you tap the button 5 times in a row, it will become a "touch operation disabled function" and future touch operations will be disabled. In addition to preventing malfunctions caused by accidentally touching the earphones, the system also turns off the announcement sound and LED lighting, making it useful when you want to concentrate on the content for a long time.
🎶 Equipped with new feature "Multi-point": Supports multi-point connection that allows up to 2 devices to connect via Bluetooth at the same time. You can connect two devices at the same time and operate each one seamlessly without having to switch connections. For example, you can pair your PC and smartphone and receive calls from your smartphone while listening to music on your PC.
🎶 Package contents: COTSUBU MK2+, charging case, earpiece final TYPE E for TWS - SS/S/M size, USB-C charging cable, instruction manual, 12-month warranty, customer support *Product packaging is subject to change without notice. Please note that the product may be delivered in a different package depending on the time of purchase. Please note that there is no difference in the product itself.
3.5g per side! Ultra-compact and ultra-lightweight “COTSUBU” is born! Completely wireless earphones that have everything: sound, connectivity, and ease of use. Japan's largest audio visual award VGP2021 Summer Special Award Cospa Grand Prize and Double Gold Award Winner
