Haylou S40

Name: Haylou S40
Brand: Haylou
SKU: 7091

Manufacturer: Haylou

The Haylou S40 is a versatile pair of headphones designed to deliver both wired and wireless connectivity. With a comfortable over-ear fit, it features active noise cancellation (ANC) for a more immersive listening experience, making it ideal for long sessions. Despite its robust features, the headphones weigh just 280 grams and can be easily folded for storage.

Equipped with a 40 mm driver unit and supporting spatial audio, the Haylou S40 provides clear and balanced sound. It also offers a generous 90-hour battery life when used without ANC, and 60 hours with ANC activated. The headphones support Bluetooth 6.0, and are capable of handling LDAC audio for high-quality wireless transmission.

Pros

The headphones support both wireless and wired connectivity, offering flexibility for different device connections.
Active noise cancellation (ANC) helps improve sound clarity by reducing background noise during use.
The removable microphone allows for easy customization and a cleaner look when not in use.
With up to 90 hours of battery life, these headphones can last for extended periods, even without ANC activated.
The headphones are foldable, making them convenient to store and carry when not in use.

Cons

The headphones do not have water resistance, making them unsuitable for use in wet conditions.
They do not support wireless charging or solar power, limiting charging options.
The headphones lack an in-line control panel, which could affect ease of use for some users.
The headphones do not feature auto-pause music functionality, which could be inconvenient for users who frequently take them off.

Who is this for?

The Haylou S40 headphones are ideal for users who need a versatile pair of headphones for both wired and wireless use, with a strong focus on battery life and audio performance. With a 90-hour battery life (up to 60 hours with ANC) and active noise cancellation (ANC), they are well-suited for long listening sessions in noisy environments, such as during travel or commuting. The headphones are also great for users who need a detachable microphone for clear communication and who appreciate foldable design for easy storage and portability.

Who is this NOT for?

The Haylou S40 headphones are not the best choice for users who require waterproofing, as they lack water resistance. Additionally, they may not be ideal for those who need features like auto-pause music or an in-line control panel for quick adjustments. These headphones are also less suited for high-intensity, outdoor activities, as they don't support wireless charging or solar power, limiting charging flexibility in such environments.

Design:

Fit	Over-ear
weight	280 g
has a detachable cable	✓
water resistance	None
can be folded	✓
is designed for kids	✕
has a tangle free cable	✓
travel bag is included	✕
has an open-back design	✕
has stereo speakers	✓

The Haylou S40 headphones are designed with an over-ear fit for enhanced comfort during long listening sessions. Weighing just 280 grams, they are lightweight yet durable. The headphones feature a detachable cable for added convenience and a tangle-free cable that reduces frustration. Additionally, they can be easily folded for compact storage, though no travel bag is included. While not designed for kids, the headphones offer stereo speakers for quality sound and lack water resistance and an open-back design.

Sound quality:

has active noise cancellation (ANC)	✓
lowest frequency	20 Hz
highest frequency	20000 Hz
driver unit size	40 mm
impedance	32 Ohms
supports spatial audio	✓
sound pressure level	97 dB/mW
has a neodymium magnet	✕
has passive noise reduction	✓

The Haylou S40 headphones deliver an enhanced listening experience with features like active noise cancellation (ANC) and support for spatial audio. The 40 mm driver unit ensures rich and clear sound across the frequency range, from 20 Hz to 20,000 Hz. With a sound pressure level of 97 dB/mW and passive noise reduction, these headphones offer great sound isolation without the use of a neodymium magnet.

Power:

Battery life	90 hours
Battery life (ANC)	60 hours
charge time	2.5 hours
Has USB Type-C	✓
has a battery level indicator	✓
has wireless charging	✕
battery power	650 mAh
Has a solar power battery	✕
has a rechargeable battery	✓
has a removable battery	✕

The Haylou S40 headphones offer impressive battery performance with a 90-hour battery life when used without ANC, and up to 60 hours with ANC activated. Charging takes just 2.5 hours, and the headphones feature a battery level indicator to keep you informed. Powered by a 650 mAh rechargeable battery, the S40 does not support wireless or solar charging, and the battery is not removable.

Connectivity:

connectivity	Wireless & wired
Bluetooth version	6
has aptX Adaptive	✕
has aptX	✕
has LDAC	✓
has LDHC	✕
has Bluetooth LE Audio	✕
has aptX Low Latency	✕
has aptX HD	✕
has aptX Lossless	✕
has AAC	✓
has Auracast	✕
audio latency	80 ms
maximum Bluetooth range	20 m
has fast pairing	✕
supports Bluetooth pairing using NFC	✕

The Haylou S40 headphones support both wired and wireless connectivity, making them versatile for various devices. Featuring Bluetooth 6.0, they offer a stable connection with a maximum range of 20 meters. The headphones support LDAC for high-quality wireless audio transmission and the AAC codec for efficient compatibility with a wide range of devices. They do not support features like aptX, LE Audio, or NFC pairing.

Features:

release date	August 2025
has a noise-canceling microphone	✓
has ambient sound mode	✓
has in/on-ear detection	✕
number of microphones	11
has a mute function	✕
multipoint count	2
control panel placed on a device	✓
can be used as a headset	✓
Has an in-line control panel	✕

The Haylou S40 headphones come equipped with a noise-canceling microphone for clearer calls and communication. They also feature ambient sound mode to allow for some environmental awareness while listening. With the ability to connect to two devices simultaneously, they support multipoint pairing. The headphones include 11 microphones, allowing for enhanced sound quality, and can be used as a headset, though they do not have in-line controls or an auto-pause feature.

Miscellaneous:

has a removable microphone	✓

The Haylou S40 headphones feature a removable microphone, offering flexibility for users who prefer to detach it when not in use. This design ensures convenience, allowing for a cleaner, more streamlined look when using the headphones solely for music or audio playback.

Final Verdict

The Haylou S40 headphones are a solid choice for users seeking long-lasting battery life and flexible connectivity. With up to 90 hours of battery life and support for both wireless and wired modes, they excel in providing extended use without frequent recharging. The inclusion of active noise cancellation (ANC) enhances the listening experience, making these headphones suitable for long trips or noisy environments. While lacking some advanced features like auto-pause or wireless charging, they are well-suited for general use, particularly for those who prioritize battery longevity and microphone flexibility. Overall, the Haylou S40 offers a balanced set of features for everyday listening and communication needs.