The HAYLOU S40 Noise Cancelling Headphones Over Ear deliver a comprehensive audio experience with advanced hybrid ANC technology capable of reducing ambient noise by up to 50dB across multiple modes. This over-ear model supports LDAC high-resolution wireless audio, ensuring detailed sound reproduction for a wide range of musical genres. The ear cushions are crafted from soft protein leather with memory foam padding, providing a comfortable fit during extended listening sessions. The headband structure is reinforced with metal components, contributing to overall durability while maintaining a lightweight feel.

The housing is constructed from matte-finish ABS plastic with a subtle texture that resists fingerprints and minor scuffs. The headphones feature Bluetooth 6.0 multipoint connectivity, allowing seamless switching between two paired devices without manual reconnection. The battery performance is rated at up to 90 hours of playback time on a single charge, with a quick charge capability that yields several hours of use after a short charging period. The control interface includes physical buttons on the earcup for volume, playback, and ANC mode adjustments, offering tactile feedback for reliable operation.

The built-in five high-definition microphones work in tandem to capture clear voice signals during calls, with environmental noise suppression technology minimizing background distractions. The companion application provides a customizable equalizer with multiple presets and manual adjustments, enabling users to tailor the sound signature to their preferences. The headphones support both wired and wireless operation, with the included USB-C charging cable and a 3.5mm audio cable for devices lacking Bluetooth.

The fold-flat design facilitates compact storage and portability, making them suitable for travel or daily commuting. The overall build quality demonstrates consistent assembly tolerances, with no noticeable creaking or flex in the hinge areas. These headphones are positioned as an affordable option within the noise-cancelling category, offering a balance of feature density and value.

The ANC performance is effective for typical office or transit environments, while the transparency mode allows ambient sounds to pass through when needed. The latency over Bluetooth is low enough for casual video watching and gaming, though professional-grade real-time audio work may require a wired connection. The microphone array handles voice commands and calls adequately in quiet to moderately noisy settings.