Not only was the brand given with numerous awards in the most acknowledged Audio&Visual Prize VGP2021, ag has also gained over 40% of market shares among TWS in Japan, becoming one of the favourite brands among consumers in the recent years!

*One Year Warranty

Free shipping for orders spending over HK$300 [Non-Member] on order

Free Shipping to Macau for order spending over HK$500 [Non-Member] on order

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Customer Reviews
【The Birth of the Smallest and Most Comfortable TWS】

This year, ag has once again introduced a whole new TWS model, COTSUBU. Despite targeting the entry market, COTSUBU has been awarded two different prizes in VGP2021 Summer. With its lightweight design and 7 choices of colours, COTSUBU is definitely one of TWS with the best value in the market!

Choose Your Own Style

Except keeping "Cream" and "Black", ag has introduced five whole new colour choices including 'Brownie", "Stone", "Sky", "Snow" and "Sakura", bringing you the best performance inside and out.

High Cost-Performance Ratio

Using the Qualcomm® QCC3040 chipset, COTSUBU supports Bluetooth 5.2 and codecs including aptX, SBC and AAC. COTSUBU also supports Qualcomm® True Wireless™ Mirroring, enabling your earphones to switch between "Primary" and "Secondary" earbuds automatically, enhancing the stability and efficiency in connectivity.

The Thinking of Design

Since everyone has different shapes of ears, the R&D staff of ag deliberately designed the shape of COTSUBU which allowing the user to adjust the earbuds to vertical or horizontal to achieve the best comfortability.


QUALCOMM QCC3040,Bluetooth 5.2
Supported Codec
Playback Hours (Approx.)
5 Hours/Charge, 20Hours including charging case
Frequency Response
2 * 30mAh + 200mAh Charging Case
Charging Case,final Type E TWS Earpiece(SS,S, M),Type-C cable
Shipping & Payment

Delivery Options

  • SF Express (Hong Kong)
  • S.F. Express - EF Locker Pickup
  • 7-11 Store Pickup
  • Circle K Store Pickup
  • S.F. Express - S.F. - Business Station Pickup
  • S.F. Express - Store Pickup
  • Pick up at NPMall Showroom
  • Macau Delivery

Payment Options

  • Credit Card(Visa/ MasterCard/ AMEX)
  • Alipay (HK)_SHOPLINE Payments
  • PayPal & Credit Card
  • Payme
  • FPS
  • Octopus
  • Atome (Buy Now Pay Later)
  • Credit Card via Stripe
  • Google Pay
  • Apple Pay
  • Bank Transfer
Customer Reviews
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