ag COTSUBU MK2 (AG-TWS09R)
ag COTSUBU MK2 Wireless Earphones User Manual
Model: COTSUBU MK2 (AG-TWS09R)

A Japanese Brand
1. Okwu mmalite
The ag COTSUBU MK2 is the latest model of the popular COTSUBU wireless earphones, known for their compact size, lightweight design, and excellent sound quality. With cumulative shipments exceeding 300,000 units, this new 2024 model features renewed colors, even clearer sound quality, and added functionalities.
The earphone body is an ultra-compact and ultra-lightweight type, weighing approximately 3.5g per side, making it the smallest and lightest in the series. It offers a comfortable fit that makes you forget you're wearing them. Its deep-fit design ensures a snug fit in any ear, preventing accidental drops, even when removing a mask. This design also provides high sound insulation, effectively blocking out ambient noise without the need for active noise cancellation.

Image: ag COTSUBU MK2 earphones and charging case in Mint color.
2. Ihe ngwugwu
Biko hụ na ihe niile dị na ngwugwu:
- COTSUBU MK2 Earphones
- Nchaji case
- Earpieces (final TYPE E for TWS - SS/S/M sizes)
- USB-C eriri USB
- Akwụkwọ ntuziaka
- Kaadị akwụkwọ ikike nke ọnwa 12
Note: Product packaging may change without prior notice. Depending on the time of purchase, you may receive a different product package. However, there is no difference in the product itself.
3. Nhazi
3.1 Ịchaji ekwe ntị na akpa
Before first use, fully charge the earphones and the charging case. Connect the provided USB-C cable to the charging port on the case and a USB power source. The charging time is approximately 1.5 hours.

Image: Mint colored COTSUBU MK2 earphones inside their charging case.
3.2 Ijikọ na ngwaọrụ
- Mepee igbe nchaji. Igwe ntị ga-abanye na ọnọdụ njikọta na-akpaghị aka.
- On your device (smartphone, tablet, PC), go to Bluetooth settings.
- Select "COTSUBU MK2" from the list of available devices.
- Once connected, a confirmation sound will play.
3.3 Selecting the Right Eartips
The package includes final TYPE E earpieces in SS, S, and M sizes. Choosing the correct size is crucial for optimal sound quality and comfort. Experiment with different sizes to find the best fit that provides a secure seal in your ear canal.
Image: A woman wearing a pink COTSUBU MK2 earphone, illustrating the secure and comfortable fit.
4. Na-arụ ọrụ ekwe ntị
The COTSUBU MK2 earphones feature intuitive touch controls for various functions.
4.1 Basic Touch Controls
| Omume | Ọrụ |
|---|---|
| Otu mgbata | Kpọọ/Kwụsị Egwu, Zaa/Kwụsị Oku |
| Pịa ugboro abụọ (mbọchị ntị aka nri) | Track na-esote |
| Pịa ugboro abụọ (mkpọ ntị aka ekpe) | Egwu gara aga |
| Pịa ugboro atọ | Mee ka onye enyemaka olu rụọ ọrụ |
| Ogologo Pịa | Jụ oku |
4.2 Touch Operation Disable Function
The COTSUBU MK2 includes a unique "Touch Operation Disable Function" to prevent accidental touches and allow for focused listening. To activate this function, tap either earphone 5 times consecutively. Once activated, all subsequent touch operations will be disabled. This also turns off announcement sounds and LED lights, making it ideal for situations where you want to concentrate on your content without distractions.
Image: A woman demonstrating the touch control feature on the ag COTSUBU MK2 earphone.
5. Nlekọta
Proper maintenance ensures the longevity and optimal performance of your earphones.
5.1 Nhicha
- Regularly clean the eartips and the mesh part of the earphones to prevent wax buildup, which can affect sound quality. Use a soft, dry cloth or a cotton swab.
- Wipe the charging contacts on both the earphones and the case with a clean, dry cloth to ensure proper charging.
- Do not use abrasive cleaners or immerse the earphones in water.
5.2 Nchekwa
Always store the earphones in their charging case when not in use to protect them from dust, dirt, and physical damage.
6. Nchọpụta nsogbu
If you encounter issues with your COTSUBU MK2 earphones, try the following solutions:
6.1 Enweghị ụda ma ọ bụ ụda na-akwụsị akwụsị
- Gbaa mbọ hụ na chajịrị ekwe ntị nke ọma.
- Check if the earphones are properly paired with your device. Try re-pairing them.
- Ensure the volume on both your device and the earphones is turned up.
- Hichaa kọntaktị ịchaji na ma ekwe ntị yana akpa ahụ.
- If only one earbud has sound, try placing both earbuds back in the case, closing it, waiting a few seconds, and then taking them out again.
6.2 Okwu njikọta
- Gbaa mbọ hụ na agbanyere Bluetooth na ngwaọrụ gị.
- Ensure the earphones are in pairing mode (open the case).
- Chefuo ngwaọrụ ahụ na ntọala Bluetooth nke ngwaọrụ gị wee nwaa ijikọ ọzọ.
- Move closer to your device and away from potential interference sources.
6.3 Okwu nchaji
- Nyochaa na ejikọrọ eriri USB-C nke ọma na ma ikpe ahụ yana isi iyi ike.
- Gbalịa eriri USB-C dị iche ma ọ bụ ihe nkwụnye ọkụ.
- Hichaa kọntaktị ịchaji na ekwe ntị na n'ime akpa ahụ.
6.4 Fragility Concerns
Some users have reported concerns regarding the durability of the earphones over time, specifically with sound issues in one earbud or connection stability. While the product is designed for daily use, handle with care to prevent damage from drops or impacts. If issues persist, please refer to the warranty and support section.
7. Nkọwapụta
| Njirimara | Nkọwa |
|---|---|
| Aha Nlereanya | COTSUBU MK2 |
| Nọmba Nlereanya Onye nrụpụta | AG-TWS09R |
| Ụdị | ag (by final Inc.) |
| Teknụzụ Njikọta | Ikuku (Bluetooth) |
| Ntinye ntị | N'ime ntị |
| Ihe kpatara ụdị ekweisi | Ezi ikuku |
| Njikwa mkpọtụ | Sound Isolation (Deep Fit Design) |
| Oge Nchaji | Ihe ruru. Awa 1.5 |
| Ngwa dakọtara | Tablets, Desktop PCs, Mobile Phones, Laptops |
| Eji ngwaahịa | Ntụrụndụ |
| Nha | Obere |
| Akụkụ ngwugwu | 12.5 x 10.2 x 4 cm |
| Ibu | 150 g (package); approx. 3.5g per earbud |
| Agba | Mint (other colors available) |
8. Akwụkwọ ikike na nkwado
Your ag COTSUBU MK2 earphones come with a 12-month manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For customer support, warranty claims, or technical assistance, please refer to the contact information provided in your warranty card or visit the official ag brand websaịtị. Debe ihe akaebe nke ịzụrụ ihe maka nkwado akwụkwọ ikike.
Image: Charging case with text indicating a 1-year warranty.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.