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COOSII Manuals & User Guides

COOSII specializes in affordable, high-quality audio products, including wired and wireless headphones featuring noise-canceling microphones for work, gaming, and media.

Tip: include the full model number printed on your COOSII label for the best match.

About COOSII manuals on Manuals.plus

COOSII is a consumer electronics brand recognized for its reliable and affordable audio products, specializing primarily in wired and wireless headphones, as well as versatile Bluetooth headsets. Designed with everyday users and professionals in mind, COOSII integrates practical features like dual-microphone boom technology, environmental noise cancellation (ENC), and premium ear comfort through soft memory-protein earpads.

Their product lineup includes popular communication and media devices such as the P80C Bluetooth Headphones, the H300 Wireless Headsets equipped with a USB dongle for seamless office integration, and the classic AC01 Over-Ear Wired Headphones. Dedicated to providing users with crystal-clear audio experiences, COOSII equipment is built to handle the demands of call centers, home offices, gaming setups, and daily transit.

COOSII manuals

Latest manuals from manuals+ curated for this brand.

COOSII H300 Wireless Headphones User Guide

June 26, 2026
COOSII H300 Wireless Headphones What's in the Box Schematic Multi-function Button Power On/ Off Button Music/ Call Control Button Previous/ Next Track Button M Button Switch Between Dongle / Bluetooth…

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COOSII support FAQ

Common questions about manuals, registration, and support for this brand.

  • How do I pair my COOSII Bluetooth headphones?

    To enter pairing mode, simply turn on the headphones via the power button. Then, open the Bluetooth settings on your mobile device or computer, locate your COOSII device in the list, and select it to establish a wireless connection.

  • How do I claim warranty support for my COOSII device?

    COOSII headphones are typically covered by a 12-month limited warranty. If you require a repair or replacement, you can contact the original place of purchase or email COOSII directly at service@coosii.com with your order ID and a description of the defect.

  • Where can I find the user manual for my COOSII headphones?

    You can find PDF user manuals, safety instructions, and setup guides for COOSII audio products directly on this site, or by reaching out to their customer support team.

  • How do I charge my wireless COOSII headset?

    Plug the provided micro-USB charging cable into the headset and connect the other end to a standard USB power source. It usually takes approximately two to two and a half hours to fully recharge the battery.