Cotsubu Mk2

The popular wireless earphone "COTSUBU MK2," which has exceeded 500,000 units shipped, has evolved into "COTSUBU MK2+" (COTSUBU MK2 Plus) with the addition of "Multi-Point" connectivity that allows connection to multiple devices.

With the smallest and lightest body in the ag brand, it achieves a "light" wearing comfort that makes you forget you are wearing it. It adopts an "Adjust Fit Mechanism" that allows the body to rotate to fit the shape of the ear, making it possible to fit any ear snugly. Additionally, with a deep fit design, it is inserted firmly into the ear canal, achieving high sound insulation that cuts surrounding noise even without active noise canceling. It also prevents sound leakage.

In addition to the popular CREAM, SKY, SAKURA, and the standard color KURO, there are seven color variations: LEMON, MINT, and NAVY. The body is finished with a unique powder snow coating that feels smooth, making it less slippery when removing from the case and preventing fingerprint smudges.

Additionally, it features an "Auto Pairing Function" that starts pairing just by opening the charging case, a "Mono Mode" that automatically switches when one side is returned to the charging case, and a new function "Touch Operation Disable Mode" that prevents accidental operation of the earphones by touch. Furthermore, the sound quality is enhanced by the high-quality sound design supervised by the audio brand final, making the sound more transparent compared to the first-generation COTSUBU.

"COTSUBU MK2+" not only has sufficient basic functions as a wireless earphone but also incorporates many convenient functions and subtle considerations that solve small annoyances you may notice only after using it. It is also recommended for first-time wireless earphone users and as a gift.

7 Color Variations

From the first-generation COTSUBU, popular CREAM, SKY, SAKURA, and the standard color KURO, LEMON, MINT, and NAVY are lined up. The original surface processing "powder snow coating" not only makes dirt like sebum and fingerprints less noticeable but also prevents the earphones from falling due to its non-slip nature. Furthermore, the body shape adopts a rounded design, allowing you to feel the softness and comfort of carrying it as a daily companion.

3.5g per Side! The Smallest and Lightest with Deep Fit Design for High Sound Insulation

The earphone body is an ultra-compact type with the smallest and lightest weight of approximately 3.5g per side. It provides a "light" wearing comfort that makes you forget you are wearing it. It fits snugly in any ear, preventing the earphones from popping out, and there is no risk of accidentally touching and dropping them when wearing or removing a mask. Moreover, the "Deep Fit Design" allows for a firm fit in the ear even in a small size, achieving high sound insulation even without active noise canceling. Additionally, the "TYPE E Complete Wireless Dedicated Design" of final realizes the "ultimate wearing comfort," with three sizes available. Since they are homologous with the SS size ear pieces, they fit comfortably even for those with small ears. Furthermore, the ear pieces adopt a semi-transparent type that makes the ear canal less noticeable, maintaining a clean feeling even in places like trains where earphones are easily visible.

High-Quality Sound Design Supervised by Audio Brand final

The sound quality of wireless earphones often lacks power in the speaker section, heavily relying on the equalizer on the software side for sound quality adjustments, which is a major cause of "listening fatigue" in the high-frequency range. To avoid such phenomena, many products excessively emphasize low frequencies, resulting in an unbalanced sound. In "COTSUBU MK2+", the speaker's acoustic characteristics are pursued to achieve satisfactory sound quality even without an equalizer on the software side, adopting a method that only slightly corrects the concerning parts in the high-frequency range caused by Bluetooth®.

"Adjust Fit Mechanism" for Optimal Fit for Anyone

While being compact, it adopts an "Adjust Fit Mechanism" to achieve higher wearing performance. The shape of the ear varies from person to person, and maintaining an optimal fit for anyone with a specific shape is extremely difficult. By minimizing the size and adopting a shape design that allows the holding position to be adjustable in "vertical" or "horizontal" with the "Adjust Fit Mechanism," it achieves high holding power and comfortable fitting for any user.

Supports "Multi-Point"

Supports multi-point connection that allows Bluetooth® connection to up to two devices simultaneously. You can connect two devices at the same time without switching connections, allowing you to operate them seamlessly. For example, you can pair it with a PC and a smartphone, and listen to music on the PC while receiving calls on the smartphone.

New Function "Touch Operation Disable Function" Equipped

The earphone body supports touch operation, allowing you to operate music playback/stop and call/end more easily. Additionally, tapping five times continuously will activate the "Touch Operation Disable Function," making subsequent touch operations invalid. This prevents accidental operation of the earphones by touch and simultaneously turns off announcement sounds and LED lighting, making it useful when you want to concentrate on content for a long time.

Equipped with "Auto Pairing Function"

The charging case is slim and compact, allowing easy opening and closing with one hand. Additionally, it is equipped with the "Auto Pairing Function" that starts pairing as soon as you open the lid of the charging case. You can listen to music immediately after wearing them in your ears. Also, when you store the main unit in the charging case and close the lid, the power automatically turns off, preventing you from forgetting to turn off the power, providing peace of mind.

Equipped with "Single Ear Mode"

By simply returning one earphone to the case, it automatically switches to "Single Ear Mode" without interrupting the music. In "Single Ear Mode," it switches from stereo playback to mono playback, so there is no discomfort even when enjoying music with one ear. For example, it is useful when you want to listen to music with one ear while cooking without shutting out external sounds. *1: "Single Ear Mode" is only available during music playback.

IPX4 Water Resistance for Everyday Use

IPX4 water resistance ensures peace of mind even with sudden weather changes. You can use it without stress on rainy days or during sports.

Guidance Voice by Junko Kubo, Active Worldwide as a Freelance Announcer

The guidance voice for "Power ON" and "Bluetooth Connected" is provided by Junko Kubo, a freelance announcer active worldwide. Junko Kubo has been responsible for the guidance voice for products since ZE8000MK2.


Born in Tokyo in 1972. Spent her elementary school years in England and her high school years in America. After graduating from university, she joined NHK. Since 2004, she has been active as a freelance announcer, appearing on TV and radio, while also engaging in writing and translating picture books. Currently residing in New York with her family, she obtained the international Montessori teacher qualification in America in 2014 and started working as a teacher at a Montessori kindergarten, which was her aspiration. She expands her activities both domestically and internationally with keywords "children," "language," and "education." Official Instagram: https://www.instagram.com/kubojunkony/

*The promotional photos and profile content of Junko Kubo are used with permission, so please refrain from using them for commercial purposes, etc.

Single Ear Purchase Available in Case of Loss

During the warranty period, if you happen to lose one ear, you can purchase a single ear replacement.