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1More S51 specifications and in-depth review

1More S51

Manufacturer: 1More

The 1More S51 are true wireless earbuds designed with an open-ear fit, making them a straightforward option for those who prefer a less isolating wearing experience. Weighing just 18 g, they are built without a neckband or wingtips, keeping the design minimal. The earbuds include a charging case that extends total playback to 40 hours combined, and the package also comes with a travel bag for everyday portability.

On the technical side, the S51 uses Bluetooth 5.3 with a maximum range of 10 m and delivers audio latency of 80 ms. Charging is handled via USB Type-C with fast charging support, reaching a full charge in around 2 hours. The microphone array consists of four mics with noise-canceling capability, and the earbuds can function as a headset with a mute function built in. Voice prompts and a battery level indicator are also present, while touch or on-device controls allow playback management directly from the earbuds.

Pros
  • Open-ear fit allows awareness of surrounding environment during use
  • Combines 11 hours of earbud battery life with 29 additional hours from the charging case for extended use
  • Fast charging support reduces downtime between sessions
  • Four-microphone array with noise-canceling capability supports clearer call quality
  • IPX5 rating provides reliable sweat resistance during physical activity
  • Travel bag included in the box adds practical portability out of the box
Cons
  • No active noise cancellation, limiting use in louder environments
  • Lacks wireless charging, requiring a wired connection via USB Type-C every time
  • No advanced audio codecs supported, including LDAC, AAC, and all aptX variants
  • No ambient sound mode available as a separate listening option
  • Maximum Bluetooth range of 10 m is relatively short for a wireless product
  • No in-ear detection means music will not pause automatically when earbuds are removed
Who is this for?

The 1More S51 is well suited to users who prioritize situational awareness during their day, such as those who listen while commuting, working at a desk, or exercising outdoors where hearing ambient sounds matters. The IPX5 sweat resistance and lightweight 18 g build make them a practical choice for fitness-oriented users who need reliable protection without added bulk. The four-microphone noise-canceling setup and headset functionality also make them a reasonable fit for people who regularly take calls or participate in remote meetings throughout the day.

Who is this NOT for?

Users who need effective noise isolation or active noise cancellation — such as those working in loud offices, traveling frequently, or concentrating in noisy environments — will find the open-ear design and lack of ANC inadequate for their needs. The absence of advanced audio codecs like LDAC, AAC, and aptX makes these earbuds a poor match for audiophiles or anyone who prioritizes high-resolution wireless audio quality. Additionally, the 10 m Bluetooth range and lack of wireless charging may frustrate users who expect greater connectivity flexibility or the convenience of a cable-free charging routine.

Design:

Fit Open-ear
Ingress Protection (IP) rating IPX5
water resistance Sweat resistant
weight 18 g
has no wires or cables ✓
are neckband earbuds ✕
wingtips included ✕
has RGB lighting ✕
has stereo speakers ✓
has UV light ✕
Has a display ✕

The 1More S51 adopts an open-ear fit and a fully true wireless design, meaning there are no cables, neckbands, or wingtips involved. At just 18 g, the earbuds are notably lightweight, and they carry an IPX5 rating, making them sweat resistant during activity. Each earbud houses a stereo speaker, while the overall design omits RGB lighting, a UV light, and any built-in display, keeping things functionally straightforward.

Sound quality:

has active noise cancellation (ANC) ✕
has passive noise reduction ✓
lowest frequency 20 Hz
highest frequency 20000 Hz
supports spatial audio ✕
has Dolby Atmos ✕
has Dirac Virtuo ✕
has a neodymium magnet ✕

The 1More S51 covers a frequency range of 20 Hz to 20,000 Hz and includes passive noise reduction to help reduce ambient sound without active processing. There is no active noise cancellation (ANC), and the earbuds do not support spatial audio, Dolby Atmos, or Dirac Virtuo. A neodymium magnet is also absent from the driver configuration.

Power:

Battery life 11 hours
Battery life of charging case 29 hours
charge time 2 hours
has wireless charging ✕
Has a solar power battery ✕
has a battery level indicator ✓
has a rechargeable battery ✓

The 1More S51 offers 11 hours of battery life per charge, with the charging case contributing an additional 29 hours for a combined total of 40 hours. A full charge takes 2 hours, and the earbuds feature a battery level indicator so remaining power is easy to check. The battery is rechargeable, though wireless charging and solar power are not supported.

Connectivity:

has fast pairing ✕
Has USB Type-C ✓
Bluetooth version 5.3
has LDAC ✕
has LDHC ✕
has Bluetooth LE Audio ✕
has aptX Adaptive ✕
has aptX Low Latency ✕
has aptX HD ✕
has aptX ✕
has aptX Lossless ✕
audio latency 80 ms
has aptX Voice ✕
has Auracast ✕
maximum Bluetooth range 10 m
supports Bluetooth pairing using NFC ✕
Can be used wirelessly ✓
has AAC ✕

The 1More S51 connects wirelessly via Bluetooth 5.3 with a maximum range of 10 m and an audio latency of 80 ms. Charging uses USB Type-C, and the earbuds do not support fast pairing or NFC pairing. On the codec side, none of the advanced options are available — LDAC, LDHC, AAC, aptX in any of its variants (including aptX HD, aptX Adaptive, aptX Low Latency, aptX Lossless, and aptX Voice), LE Audio, and Auracast are all absent.

Features:

has ambient sound mode ✕
has in/on-ear detection ✕
has find device feature ✕
Supports fast charging ✓
can read notifications ✕
has a mute function ✓
can be used as a headset ✓
control panel placed on a device ✓
Has voice prompts ✓
travel bag is included ✓
Has an in-line control panel ✕
Has a temperature sensor ✕
Has a built-in camera remote control function ✕

The 1More S51 supports fast charging and can function as a headset, complete with a mute function and voice prompts for audio feedback. Controls are handled through an on-device control panel, while an in-line control panel is not included. A travel bag is bundled in the box. The earbuds do not offer ambient sound mode, in-ear or on-ear detection, a find device feature, notification reading, a body temperature sensor, or a built-in camera remote.

Microphone:

number of microphones 4
has a noise-canceling microphone ✓

The 1More S51 is equipped with a total of 4 microphones, and the setup includes noise-canceling microphone capability to help reduce unwanted background sound during calls.

Final Verdict

The 1More S51 is a true wireless earbud option that carves out a clear niche for users who value awareness of their surroundings over acoustic isolation. Its open-ear design, sweat resistance, and combined 40-hour battery life make it a practical companion for active, on-the-go use, while the four-microphone noise-canceling setup adds genuine utility for calls and remote work. That said, the absence of active noise cancellation, advanced audio codecs, and wireless charging means the S51 is best understood as a lifestyle-oriented daily driver rather than an audiophile or commuter-focused product. For users whose priority is all-day wearability and situational awareness, it delivers a coherent and well-rounded package.

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