IASUS EAR3H-MK2 Helmet Audio Amplifier — 12dB Boost, 3.5mm I/O, 7h Battery Life

Meet the IASUS EAR3H-MK2 Helmet Amplifier, a refined evolution in helmet audio technology. It’s designed to be smaller, sleeker, and more minimal, while delivering powerful digital amplification for an engaging listening experience on the move. This compact unit sits comfortably beneath your helmet and enhances audio without adding bulk, making it a practical upgrade for riders, commuters, and enthusiasts who value clarity and control.

Sharper sound for helmet comms

The EAR3H-MK2 offers up to 12dB of volume boost with distortion kept under 0.3% at full boost, so you can enjoy louder audio with clean, precise tones in diverse environments. With 12 levels of amplification, you can fine-tune the balance between loudness and comfort as conditions change—whether you’re cruising on a sunny highway or navigating a busy urban street. The device supports a standard 3.5mm output and a 3.5mm input, ensuring broad compatibility with most helmet communication systems featuring a 3.5mm earbud port.

• 12dB boost with ultra-low distortion
• Up to 7 hours of continuous playback
• 90-minute recharge using USB-C to 3.5mm cable
• Wide compatibility with helmet systems via 3.5mm ports
• Magnetic quick-release mount with 3M adhesive for easy setup

Real-world use and versatility

Designed for riders, pilots, and professionals who rely on reliable audio during shifts, training, or weekend rides. The EAR3H-MK2’s compact, minimal form fits comfortably under a helmet, while delivering crisp highs, reinforced midrange, and a stable low end as speeds rise. The combination of a secure magnetic mount and a straightforward port layout makes it easy to install, adjust, and remove when needed.

• Effortless installation and removal with the magnetic mount
• Secure performance across a wide range of helmet configs
• Low-profile design that stays comfortable for long wear
• Flexible input/output routing for diverse devices

Battery life and warranty

Plan for extended sessions with up to seven hours of playtime, and enjoy a quick 90-minute recharge using the included USB-C to 3.5mm charging cable. Purchasing is protected by a 30-day money-back guarantee and a 1-year limited manufacturer warranty for added peace of mind.

In short, the EAR3H-MK2 was built to be smaller, sleeker, and more minimal, while preserving a powerful listening experience. It is compatible with most helmet comms systems that use a 3.5mm earbud port, and it ships with a USB-C to 3.5mm charging cable for fast recharging. If you’re seeking clearer, louder helmet audio without sacrificing comfort, this compact amplifier provides a practical, no-pressure option to explore.