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1More S31 specifications and in-depth review

1More S31

Manufacturer: 1More

The 1More S31 are true wireless earbuds built around an open-ear design, making them a practical option for those who want to stay aware of their surroundings while listening. They come with wingtips for a more secure fit, weigh just 16.4 grams, and carry an IPX5 ingress protection rating, giving them reliable resistance against sweat during physical activity. A travel bag is included in the box, and the earbuds support stereo playback.

On the technical side, the S31 use a 14.2 mm driver unit with a frequency range of 20 Hz to 20,000 Hz and a 16 Ohm impedance. Connectivity runs through Bluetooth 5.3 with a stated range of up to 10 meters, and the earbuds charge via USB Type-C. Battery life stands at 8 hours per earbud with an additional 22 hours available through the charging case, which holds a 600 mAh cell. Fast charging is supported, and the estimated charge time is 1.5 hours. For calls and voice use, the earbuds include four microphones with noise cancellation, a mute function, and voice prompts.

Pros
  • Open-ear fit combined with wingtips allows for a secure hold without blocking ambient sound
  • Four microphones with noise cancellation support clearer call quality
  • The charging case offers 22 hours of additional battery life from a 600 mAh cell, extending overall usage time significantly
  • Fast charging is supported, reducing downtime between uses
  • IPX5 rating makes the earbuds suitable for sweaty workout sessions
  • A travel bag is included, adding a practical storage option out of the box
Cons
  • No active or passive noise reduction means the earbuds offer no sound isolation in loud environments
  • Bluetooth range is limited to 10 meters, restricting movement from the source device
  • No advanced audio codecs such as LDAC, aptX, or AAC are supported, limiting wireless audio quality options
  • Wireless charging is not available for the case, requiring a wired connection each time
  • No in-ear detection means music will not pause automatically when the earbuds are removed
  • No find device feature, making it harder to locate misplaced earbuds
Who is this for?

The 1More S31 is well suited to active users and commuters who want to stay aware of their surroundings while listening to audio. The open-ear design combined with IPX5 sweat resistance makes it a practical choice for outdoor workouts and running, where environmental awareness matters. Users who frequently take calls will also benefit from the four-microphone setup with noise cancellation, the mute function, and the 22-hour combined battery life that supports long days of use without frequent recharging.

Who is this NOT for?

Users who need noise isolation or active noise cancellation will find these earbuds unsuitable, as the open-ear design lets in all ambient sound by design. The lack of advanced audio codecs such as LDAC or aptX also makes them a poor fit for audiophiles or those prioritizing high-fidelity wireless audio. Additionally, users who work across a large space or frequently move far from their source device may find the 10-meter Bluetooth range limiting in practice.

Design:

Fit Open-ear
Ingress Protection (IP) rating IPX5
water resistance Sweat resistant
weight 16.4 g
has no wires or cables ✓
are neckband earbuds ✕
wingtips included ✓
has stereo speakers ✓

The 1More S31 adopts an open-ear fit and comes with wingtips to help keep the earbuds in place during use. They are fully wireless with no neckband, and at just 16.4 grams they sit on the lighter end of the scale. The earbuds carry an IPX5 rating, making them sweat resistant and suitable for workouts or outdoor activity. Stereo playback is supported across both earbuds, and no cables or wires are involved in their operation.

Sound quality:

has active noise cancellation (ANC) ✕
has passive noise reduction ✕
driver unit size 14.2 mm
lowest frequency 20 Hz
highest frequency 20000 Hz
impedance 16 Ohms
has a neodymium magnet ✕

The 1More S31 uses a 14.2 mm driver unit and covers a frequency range of 20 Hz to 20,000 Hz, with an impedance of 16 Ohms. The earbuds do not include active noise cancellation or passive noise reduction, which is consistent with their open-ear design. They also do not feature a neodymium magnet as part of their driver construction.

Power:

Battery life 8 hours
Battery life of charging case 22 hours
charge time 1.5 hours
battery power 60 mAh
battery power (charging case) 600mAh
has wireless charging ✕
has a battery level indicator ✓
has a rechargeable battery ✓

Each earbud in the 1More S31 holds a 60 mAh rechargeable battery with a rated playback time of 8 hours, while the charging case adds a further 22 hours of total battery life from its 600 mAh cell. A full charge takes around 1.5 hours, and a battery level indicator is included to help track remaining power. Wireless charging is not supported, so the case relies on a wired connection to recharge.

Connectivity:

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

The 1More S31 connects wirelessly via Bluetooth 5.3 with a maximum range of 10 meters. The earbuds do not support fast pairing or NFC pairing, and none of the advanced audio codecs are available, including AAC, LDAC, LDHC, aptX, aptX HD, aptX Adaptive, aptX Low Latency, aptX Lossless, or aptX Voice. Wired charging is handled through a USB Type-C port on the case.

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 ✕

The 1More S31 supports fast charging and can function as a headset for calls, with voice prompts and a mute function included. Controls are managed through a panel placed on the device rather than an in-line control on a cable. A travel bag is included in the package. The earbuds do not offer ambient sound mode, in-ear detection, a find device feature, notification reading, or a body temperature sensor.

Microphone:

number of microphones 4
has a noise-canceling microphone ✓

The 1More S31 is equipped with four microphones and includes noise-canceling microphone technology to help reduce unwanted background sound during calls.

Final Verdict

The 1More S31 is a true wireless earbud designed with a clear focus on active, on-the-go use. Its open-ear fit, IPX5 sweat resistance, and wingtip-secured build make it a dependable companion for outdoor and fitness-oriented listeners, while the four-microphone noise-canceling setup adds genuine utility for those who regularly take calls throughout the day. The combined 30 hours of battery across the earbuds and case further reinforces its practical, all-day orientation. Where it falls short — particularly in audio codec support and sound isolation — reflects deliberate design trade-offs rather than oversights. For users who prioritize situational awareness, call clarity, and physical durability over audiophile-grade wireless audio, the S31 delivers a coherent and functional package.