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Innovative Audio
Engineered for Tomorrow

Discover the future of sound with 21cpcb.com — where cutting-edge design meets immersive audio experiences. Powered by an in-house 21-member R&D team, we deliver OWS, TWS, Bone Conduction, and Gaming Headphones built for performance, comfort, and style.

Explore Products Learn About Us

About 21cpcb.com

A division of Shenli Electronics Co., Limited, 21cpcb.com is dedicated to pushing the boundaries of audio innovation. With a strong focus on research and development, our in-house team of 21 audio engineers crafts products that redefine listening experiences across sports, gaming, and everyday use.

21cpcb Audio Lab

Driven by Innovation

Our mission is simple: to deliver high-performance audio devices that combine advanced technology with ergonomic design. From waterproof bone conduction headphones for swimmers to dual-driver TWS earbuds with LED displays, every product is engineered with precision and tested for durability.

We specialize in OEM/ODM solutions, offering full support from concept to mass production. Our certifications ensure compliance with global standards, making us a trusted partner for brands worldwide.

  • In-house 21-member R&D team
  • Full product lifecycle support
  • Global certifications & compliance
  • OEM/ODM manufacturing capabilities

Our Product Range

From open-ear designs to immersive gaming audio, our products are built for performance, comfort, and innovation. Explore our latest audio solutions crafted for diverse lifestyles and professional needs.

OWS-1000

OWS-1000 OWS Mono Earphone

Open-ear design for situational awareness. Ideal for office, driving, and light workouts.

OWS Earbuds
Sound2Swim

Sound2Swim Bone Conduction

IPX8 waterproof rating. Perfect for swimmers and water sports enthusiasts.

Bone Conduction
Sound2Go

Sound2Go Bone Conduction

IPX8 water-resistant. Lightweight design for running, cycling, and outdoor use.

Bone Conduction
Sound2Run

Sound2Run Bone Conduction

IPX8 waterproof. Ergonomic fit for intense workouts and endurance training.

Bone Conduction
TWS-G1

TWS-G1 Gaming Earbuds

Dual-mode: 2.4G + Bluetooth. Includes USB/Type-C dongle for low-latency gaming.

Gaming Earbuds
TWS-1008

TWS-1008 Dual Driver

True wireless earbuds with dynamic bass and clear mids. Features LED power display.

TWS Earbuds
OWS-4000

OWS-4000 Clip-on Headphone

Secure clip-on design for active users. Open-ear audio with stable fit.

OWS Headphones
TWS-1004

TWS-1004 Power Bank Earbuds

True wireless earbuds with power bank output. Charge your phone on the go.

TWS Earbuds
OWS-3000

OWS-3000 Sport Headphones

Fashionable and comfortable design. Ideal for sports and daily commuting.

OWS Headphones
Wired Gaming Headphone

Wired Gaming Headphone

High-precision audio drivers. Durable build with noise-isolating mic.

Wired Gaming
Wireless Gaming Headphone

Wireless Gaming Headphone

Low-latency Bluetooth 5.3. Long battery life for extended sessions.

Wireless Gaming
Custom ODM Solutions

Custom ODM Solutions

Tailored audio products from concept to mass production. Full engineering support.

OEM/ODM

Why Choose 21cpcb.com

We combine technical excellence with agile manufacturing to deliver audio products that stand out in performance and design.

R&D

In-House R&D Team

21 dedicated audio engineers driving innovation, rapid prototyping, and technical support for custom projects.

🏭

End-to-End Manufacturing

From PCB design to final assembly, we control the entire production process for quality and consistency.

✅

Global Certifications

Products meet international standards for safety, EMC, and environmental compliance.

21+
R&D Engineers
10+
Product Lines
50+
Global Clients
15+
Years Experience

Frequently Asked Questions

Get answers to common inquiries about our products and services.

What is OWS technology?

OWS (Open Wearable Stereo) keeps your ears open while delivering rich audio, ideal for safety and awareness during outdoor activities.

Are bone conduction headphones safe?

Yes. Bone conduction transmits sound through cheekbones, bypassing the eardrums. It's safe and recommended for hearing preservation.

Do you offer OEM/ODM services?

Absolutely. We provide full OEM/ODM support, including custom design, branding, packaging, and engineering.

What certifications do your products have?

Our products comply with CE, FCC, RoHS, and other international standards. Specific certifications vary by model.

How can I request a sample?

Visit our official website to learn more about sample requests and partnership opportunities.

Get in Touch

For business inquiries, sample requests, or partnership opportunities, reach out through the official channel.

Email: helen@everrichhk.com

WhatsApp: +86-185 8845 0055

WeChat: sound2go

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