The Acefast H8 uses an on-ear fit and weighs 129 g, keeping the overall form relatively light for daily wear. It features a closed-back design with stereo speakers and is not intended for children. The headphone cannot be folded and does not include a detachable or tangle-free cable, nor does it offer any water resistance. A travel bag is included in the package, which adds some convenience for transport despite the lack of a folding mechanism.
The Acefast H8 is equipped with a 40 mm driver unit and covers a frequency range of 20 Hz to 20,000 Hz. It includes active noise cancellation (ANC) to help reduce ambient sound during use, though it does not offer passive noise reduction as a separate feature. Spatial audio is not supported, and the driver does not use a neodymium magnet.
The Acefast H8 runs on a built-in 500 mAh rechargeable battery that is not removable, delivering a rated battery life of 60 hours on a single charge. It refuels via USB Type-C in approximately 2.5 hours, and a battery level indicator is included to help track remaining charge. Wireless charging and solar charging are not supported.
The Acefast H8 connects wirelessly via Bluetooth 5.4 and supports the AAC codec, while higher-end audio formats such as aptX, aptX HD, aptX Adaptive, aptX Lossless, aptX Low Latency, LDAC, LDHC, and Bluetooth LE Audio are not available. The maximum Bluetooth range reaches 10 m, and audio latency is rated at 40 ms. Auracast broadcast audio is not supported, and neither fast pairing nor NFC-based pairing is available on this model.
The Acefast H8 can function as a headset thanks to its noise-canceling microphone, making it suitable for calls alongside music listening. An ambient sound mode is included, allowing users to let in environmental audio when needed. Controls are handled via an on-device panel, while an in-line control panel on the cable is not available. The headphone does not feature in/on-ear detection, so music will not pause automatically when removed.