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With 40mm drivers, the ACEFAST H9 Active Noise Cancelling Headphone provides 30dB hybrid isolation. Bluetooth 5.4 hardware sustains stable connectivity over a 10m range. From a 500mAh internal battery, the unit supports 55 hours of continuous wireless playback. Upgraded from the ACEFAST H1, this version shifts to Bluetooth 5.4 and gains 10 additional hours of ANC run-time.
Key Features
- 30dB Hybrid ANC: Active noise reduction isolates 30 decibels of external sound. It cuts engine drones and chatter.
- 500mAh Battery: 55-hour maximum runtime on a 2.5-hour full charge. Use it for a full week.
- Tactile Control Knob: Integrated physical dial for volume and track management. Mechanical clicks prevent accidental input errors.
- Fast Charging: 10-minute USB-C plug-in provides 7 hours of audio. Maintains uptime during BD load shedding.
- 40mm Drivers: Large-aperture units covering 20Hz to 20kHz frequencies. Produces flat sound across the spectrum.
- 7-Day Warranty: Limited coverage for technical malfunctions of the hardware. Validates hardware functionality immediately after purchase.
Frequently Asked Questions
Is ACEFAST H9 compatible with iPhone?
The headset pairs with any iPhone using standard Bluetooth AAC and SBC codecs. It operates across all iOS devices with a 10-meter wireless range.
How to use ACEFAST H9 control knob?
Rotate the side-mounted dial to increase or decrease volume output. Press the center to manage calls or pause music without checking your phone.
