TurboVS
Sudio B2 specifications and in-depth review

Sudio B2

Manufacturer: Sudio

The Sudio B2 takes a different approach to wireless audio with its open-ear bone conduction design, which sits outside the ear canal rather than inside it. The neckband format keeps the earbuds secure during movement, and wingtips are included for additional stability. An IPX5 water resistance rating makes them capable of handling sweat and light water exposure, and the stereo speaker setup delivers sound to both ears simultaneously.

On the technical side, the Sudio B2 covers a frequency range of 20 Hz to 20,000 Hz and supports spatial audio with Dirac Virtuo for a more dimensional listening experience. Bluetooth 5.3 handles the wireless connection with a maximum range of 10 m, and charging is done via USB Type-C with fast charging support — a full charge takes 1.5 hours and delivers up to 7.5 hours of playback. The earbuds include two microphones for call use, a mute function, voice prompts, a find-device feature, a battery level indicator, and on-unit controls, though active noise cancellation, passive noise reduction, and wireless charging are not part of the feature set.

Pros
  • The open-ear bone conduction design keeps the ear canal unobstructed, allowing users to remain aware of their surroundings during use
  • IPX5 water resistance provides a higher level of protection against sweat and light water exposure than many competing ratings
  • Spatial audio with Dirac Virtuo adds a more dimensional quality to the listening experience
  • 7.5 hours of battery life on a single charge supports extended daily use without frequent recharging
  • Fast charging reduces downtime when the battery runs low
  • A find-device feature helps locate the earbuds when misplaced
Cons
  • Neither active noise cancellation nor passive noise reduction is available, so the open-ear design offers no isolation from ambient sound
  • No advanced audio codecs are supported, including AAC, LDAC, and all aptX variants, limiting transmission to standard Bluetooth audio
  • Wireless charging is not supported, requiring a wired USB Type-C connection for every charge
  • Only two microphones are present, which is a relatively modest setup for voice and call use
  • No travel bag is included in the box, leaving users to source their own storage solution
  • Fast pairing and NFC pairing are absent, meaning initial Bluetooth setup must be done manually
Who is this for?

The Sudio B2 is well suited to users who need to stay aware of their surroundings while listening, such as those who run, cycle, or exercise outdoors, where open-ear awareness is a genuine safety consideration. The IPX5 water resistance rating and neckband format with wingtips make it a practical choice for active use in conditions involving sweat or light rain. Users who prioritize a comfortable all-day wear experience without ear canal fatigue will also find the bone conduction format appropriate, and the 7.5-hour battery life supports full-day use without mid-day charging.

Who is this NOT for?

This product is a poor fit for users who need any degree of noise isolation, as the open-ear design provides no active or passive sound blocking — making it unsuitable for noisy offices, commutes, or environments where audio focus is required. Those who depend on high-quality audio codec support such as LDAC or aptX for better wireless transmission will find no such options here, as the earbuds rely entirely on standard Bluetooth audio. Users who frequently take calls in demanding acoustic environments may also find the two-microphone setup limiting compared to setups with more dedicated call-focused hardware.

Design:

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

The Sudio B2 uses an open-ear bone conduction fit rather than a traditional in-ear design, and comes in a neckband format with wingtips included for added security during wear. It is not a true wireless product, as the neckband connects the two earpieces. The earbuds carry an IPX5 water resistance rating, making them capable of handling sweat and light water exposure, and stereo speakers are present to deliver sound to both ears.

Sound quality:

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

The Sudio B2 covers a frequency range of 20 Hz to 20,000 Hz and supports spatial audio via Dirac Virtuo for a more dimensional sound presentation. Neither active noise cancellation nor passive noise reduction is available, which is consistent with the open-ear design that keeps the user aware of their surroundings. A neodymium magnet is not part of the driver assembly in this model.

Power:

Battery life 7.5 hours
charge time 1.5 hours
has wireless charging ✕
has a battery level indicator ✓
has a rechargeable battery ✓

The Sudio B2 is equipped with a rechargeable battery that provides up to 7.5 hours of playback on a single charge, with a full charge taking 1.5 hours via USB Type-C. Wireless charging is not supported. A battery level indicator is included, allowing users to monitor remaining power without guesswork.

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 Sudio B2 connects wirelessly via Bluetooth 5.3 with a maximum range of 10 m, and charges through a USB Type-C port. Fast pairing and NFC pairing are both absent, and no advanced audio codecs are supported — this includes AAC, LDAC, LDHC, aptX, aptX HD, aptX Adaptive, aptX Low Latency, aptX Lossless, and aptX Voice — leaving the connection reliant on standard Bluetooth audio transmission.

Features:

has ambient sound mode ✕
has in/on-ear detection ✕
has find device feature ✓
Supports fast charging ✓
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 Sudio B2 supports fast charging and includes a find-device feature to help locate misplaced earbuds. It can be used as a headset and offers a mute function, voice prompts, and on-unit controls — though there is no in-line control panel. Ambient sound mode, in/on-ear detection, a body temperature sensor, and a travel bag are all absent from this model.

Microphone:

number of microphones 2

The Sudio B2 is fitted with two microphones to handle voice pickup during calls and voice interactions.

Final Verdict

The Sudio B2 occupies a distinct niche within the wireless earbuds category, built around its open-ear bone conduction design with spatial audio via Dirac Virtuo — a combination that prioritizes situational awareness and a non-intrusive listening experience over sound isolation or advanced codec support. The IPX5 rating and 7.5-hour battery life reinforce its suitability for active, outdoor use where durability and endurance matter more than studio-grade audio fidelity. Users expecting noise cancellation, high-resolution codec transmission, or wireless charging will find clear gaps in the specification sheet. For its intended audience — those who need to stay aware of their environment while still enjoying wireless audio — the Sudio B2 delivers a coherent and purposeful set of features that align well with that specific use case.