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1More Fit SE S12 specifications and in-depth review

1More Fit SE S12

Manufacturer: 1More

The 1More Fit SE S12 are open-ear true wireless earbuds designed for users who want to stay aware of their surroundings while listening. With a lightweight build of just 10 grams per earbud, they sit comfortably without the isolating seal of traditional in-ear designs. The included charging case extends total playback, and a travel bag is included in the box for added convenience on the go.

On the technical side, the S12 use a 10 mm driver unit with a frequency range of 20 Hz to 20,000 Hz and an impedance of 32 Ohms. Connectivity is handled by Bluetooth 5.4 with a maximum wireless range of 100 meters, and the earbuds charge via USB Type-C with fast charging support, reaching a full charge in around 1.5 hours. A dual-microphone setup with noise cancellation handles calls, and the IPX5 rating provides protection against water splashes during everyday use.

Pros
  • Open-ear fit allows users to remain aware of their surroundings while listening
  • Lightweight at 10 grams per earbud, reducing fatigue during extended wear
  • Bluetooth 5.4 with a 100-meter maximum range provides a stable and wide-reaching wireless connection
  • Fast charging support reduces downtime, with a full charge completed in 1.5 hours
  • Dual noise-canceling microphones support clearer call quality by reducing background noise
  • A travel bag is included in the box, making it easier to carry and store the earbuds
Cons
  • No active noise cancellation or passive noise isolation, leaving users fully exposed to ambient sound at all times
  • No support for advanced audio codecs such as LDAC, aptX, or AAC, limiting audio transmission quality options
  • Wireless charging is not supported, requiring a physical USB-C connection for every charge
  • No in-ear detection means music will not pause automatically when the earbuds are removed
  • No ambient sound mode or NFC pairing, reducing convenience features compared to more fully equipped options
Who is this for?

The 1More Fit SE S12 is well suited to users who need to stay aware of their environment while listening, such as those who exercise outdoors or commute in busy areas where blocking out ambient sound could be unsafe. The IPX5 water resistance and lightweight 10-gram build make it a practical choice for active, on-the-go use, while the dual noise-canceling microphones and headset functionality serve users who regularly take calls throughout the day. The included travel bag and USB-C fast charging add everyday practicality for those who frequently move between locations.

Who is this NOT for?

Users who prioritize immersive audio or noise isolation will find the open-ear design and lack of active noise cancellation or passive noise reduction a significant drawback in loud or distracting environments. The absence of advanced audio codecs such as LDAC or aptX also makes these earbuds a poor fit for audiophiles or high-fidelity streaming enthusiasts who require higher-quality wireless audio transmission. Additionally, users who rely on smart features like in-ear detection for automatic playback pausing, ambient sound mode, or NFC pairing will find the feature set too limited for their workflow.

Design:

Fit Open-ear
Ingress Protection (IP) rating IPX5
water resistance Water resistant
weight 10 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 Fit SE S12 features an open-ear fit that rests on the ear rather than sealing inside the ear canal, making it a true wireless design with no cables or neckband. Each earbud weighs just 10 grams, and the pair delivers stereo sound without any RGB lighting or display elements. For durability, the earbuds carry an IPX5 rating, meaning they are water resistant and can handle splashes and sweat, though wingtips are not included for additional ear stability.

Sound quality:

has active noise cancellation (ANC) ✕
has passive noise reduction ✕
driver unit size 10 mm
lowest frequency 20 Hz
highest frequency 20000 Hz
supports spatial audio ✕
has Dolby Atmos ✕
has Dirac Virtuo ✕
impedance 32 Ohms
has a neodymium magnet ✕

The 1More Fit SE S12 uses a 10 mm driver unit and covers a frequency range of 20 Hz to 20,000 Hz with an impedance of 32 Ohms. The earbuds do not include active noise cancellation or passive noise isolation, so ambient sound passes through freely, which aligns with the open-ear design. There is no support for spatial audio, Dolby Atmos, or Dirac Virtuo, and the drivers do not use a neodymium magnet.

Power:

Battery life 8 hours
Battery life of charging case 20 hours
charge time 1.5 hours
has wireless charging ✕
Has a solar power battery ✕
has a battery level indicator ✓
has a rechargeable battery ✓

The 1More Fit SE S12 offers 8 hours of battery life per charge, with the charging case providing an additional 20 hours for a combined total of 28 hours before needing a power source. A full charge takes 1.5 hours, and the earbuds support fast charging for quicker top-ups. The battery is rechargeable and includes a battery level indicator, though wireless charging and solar power are not supported.

Connectivity:

has fast pairing ✕
Has USB Type-C ✓
Bluetooth version 5.4
has LDAC ✕
has LDHC ✕
has Bluetooth LE Audio ✕
has aptX Adaptive ✕
has aptX Low Latency ✕
has aptX HD ✕
has aptX ✕
has aptX Lossless ✕
has aptX Voice ✕
has Auracast ✕
maximum Bluetooth range 100 m
supports Bluetooth pairing using NFC ✕
Can be used wirelessly ✓
has AAC ✕

The 1More Fit SE S12 connects wirelessly via Bluetooth 5.4 and reaches a maximum range of 100 meters. The earbuds do not support fast pairing or NFC pairing, and there is no compatibility with advanced audio codecs such as LDAC, LDHC, AAC, aptX, aptX HD, aptX Adaptive, aptX Low Latency, aptX Lossless, or aptX Voice. Bluetooth LE Audio and Auracast are also absent, and while the case charges over USB Type-C, the connection to devices is strictly wireless.

Features:

has ambient sound mode ✕
has in/on-ear detection ✕
Supports fast charging ✓
can read notifications ✕
Has a built-in translator ✕
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 Fit SE S12 can be used as a headset for calls and includes a mute function, voice prompts, and a control panel on the device itself, though there is no in-line control panel. Fast charging is supported, and a travel bag is included in the box. The earbuds do not offer ambient sound mode, in-ear detection for auto-pausing music, notification readout, a built-in translator, a body temperature sensor, or a camera remote shutter function.

Microphone:

number of microphones 2
has a noise-canceling microphone ✓

The 1More Fit SE S12 is equipped with two microphones that include noise-canceling capability, helping to reduce unwanted background sound during calls and voice recordings.

Final Verdict

The 1More Fit SE S12 makes a clear case for users who want a lightweight, wire-free listening experience without losing touch with their surroundings. Its open-ear design combined with IPX5 water resistance and fast-charging USB-C support positions it as a dependable companion for active, everyday use rather than critical listening sessions. The dual noise-canceling microphones and solid Bluetooth 5.4 range further reinforce its role as a practical communication and lifestyle earbud. Users seeking deep audio immersion, advanced codec support, or smart convenience features will find it falls short of their expectations, but for those whose priority is situational awareness and all-day wearability, the S12 delivers a focused and coherent feature set that matches its intended purpose.