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Tronsmart OpenFly 2 Pro specifications and in-depth review

Tronsmart OpenFly 2 Pro

Manufacturer: Tronsmart

The Tronsmart OpenFly 2 Pro are true wireless earbuds designed with an open-ear fit, 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 hold during activity, and the compact charging case brings total playtime up to 40 hours combined. A travel bag is included in the box, and the earbuds feature touch controls placed directly on the device along with voice prompts for hands-free feedback.

On the technical side, the OpenFly 2 Pro use 12 mm drivers covering a frequency range of 20 Hz to 20,000 Hz, paired with a four-microphone setup that includes noise-canceling microphone technology for clearer calls. The earbuds connect via Bluetooth 5.3 with a maximum wireless range of 10 meters and charge through USB Type-C, with fast charging support and a full charge time of around 1.5 hours. The IPX5 rating means they can handle splashes and sweat, and a mute function is available for added convenience during calls.

Pros
  • Open-ear fit allows awareness of surrounding sounds during use
  • Wingtips are included for a more secure fit during physical activity
  • Four-microphone setup with noise-canceling technology supports clearer call quality
  • Fast charging support reduces downtime, with a full charge completed in 1.5 hours
  • The charging case extends total playtime to 40 hours, useful for extended use away from power
  • A travel bag is included in the box, adding practical value for portability
Cons
  • No active noise cancellation or passive noise isolation, so audio can be affected by loud environments
  • Bluetooth range is limited to 10 meters, restricting movement from the connected device
  • No wireless charging support, requiring a wired connection every time
  • No in-ear detection, so music does not pause automatically when the earbuds are removed
  • No advanced audio codecs such as LDAC, aptX, or AAC are supported, limiting audio transmission options
Who is this for?

The OpenFly 2 Pro are well suited to users who prefer open-ear listening during outdoor activities such as running, cycling, or commuting, where staying aware of the environment is important. The IPX5 rating and wingtip design make them a practical choice for active, sweat-prone use, while the four-microphone setup with noise-canceling technology benefits people who frequently take calls on the go. The 40-hour combined battery life also makes them a good fit for users who need extended use without regular access to a power source.

Who is this NOT for?

Users seeking immersive or isolated listening will find the open-ear design limiting, as it provides no passive noise reduction or active noise cancellation, making it difficult to block out noisy environments. Audiophiles or those who rely on high-fidelity wireless audio transmission will be restricted by the absence of advanced codecs such as LDAC, aptX, or AAC. Additionally, the 10-meter Bluetooth range may not suit users who need reliable wireless connectivity across larger spaces, and the lack of in-ear detection or ambient sound mode rules out those who expect more automated or adaptive listening features.

Design:

Fit Open-ear
Ingress Protection (IP) rating IPX5
water resistance Water resistant
weight 17.6 g
has no wires or cables ✓
are neckband earbuds ✕
wingtips included ✓
has RGB lighting ✕
has stereo speakers ✓
has UV light ✕
Has a display ✕

The Tronsmart OpenFly 2 Pro feature an open-ear fit and a fully true wireless design with no cables or neckband, weighing just 17.6 g. Wingtips are included to help keep the earbuds in place, and stereo speakers are built into the design. They carry an IPX5 rating, making them water resistant and capable of handling splashes and perspiration. RGB lighting, a display, and UV light are not part of the design.

Sound quality:

has active noise cancellation (ANC) ✕
has passive noise reduction ✕
driver unit size 12 mm
lowest frequency 20 Hz
highest frequency 20000 Hz
supports spatial audio ✕
has Dolby Atmos ✕
has Dirac Virtuo ✕
has a neodymium magnet ✕

The OpenFly 2 Pro use 12 mm drivers and cover a frequency range of 20 Hz to 20,000 Hz. They do not include active noise cancellation or passive noise reduction, meaning ambient sound passes through freely — which aligns with their open-ear design. Spatial audio, Dolby Atmos, Dirac Virtuo, and neodymium magnet technology are not part of the audio setup.

Power:

Battery life 10 hours
Battery life of charging case 30 hours
charge time 1.5 hours
has wireless charging ✕
Has a solar power battery ✕
has a battery level indicator ✓
has a rechargeable battery ✓

The OpenFly 2 Pro offer 10 hours of battery life per charge, with the charging case providing an additional 30 hours, bringing the total available playtime to 40 hours. The earbuds take 1.5 hours to fully charge and support fast charging, though wireless charging and solar power are not available. A battery level indicator is included, and the battery is rechargeable.

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 ✕
has aptX Voice ✕
has Auracast ✕
maximum Bluetooth range 10 m
supports Bluetooth pairing using NFC ✕
Can be used wirelessly ✓
has AAC ✕

The OpenFly 2 Pro connect wirelessly via Bluetooth 5.3 with a maximum range of 10 meters. They charge through a USB Type-C port, and pairing is handled through standard Bluetooth — fast pairing and NFC pairing are not supported. On the codec side, the earbuds do not support AAC, LDAC, LDHC, aptX in any of its variants (including aptX Adaptive, aptX HD, aptX Low Latency, aptX Lossless, or aptX Voice), Bluetooth LE Audio, or Auracast.

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 OpenFly 2 Pro support fast charging and can be used as a headset for calls, with a mute function available and voice prompts to provide audio feedback. Controls are handled through a panel placed on the earbuds themselves rather than an in-line control on a cable. A travel bag is included in the box. The earbuds do not offer ambient sound mode, in-ear detection for auto-pause, a find-device feature, notification readout, a body temperature sensor, or a built-in camera remote.

Microphone:

number of microphones 4
has a noise-canceling microphone ✓

The OpenFly 2 Pro include a four-microphone setup with noise-canceling microphone technology, aimed at reducing unwanted background sound during calls and voice use.

Final Verdict

The Tronsmart OpenFly 2 Pro are a straightforward set of open-ear true wireless earbuds built around practicality and situational awareness rather than immersive audio isolation. Their open-ear design paired with IPX5 water resistance and wingtip support makes them well suited to active, everyday use, and the 40-hour combined battery life adds genuine convenience for users on the move. The four-microphone noise-canceling setup strengthens their case as a hands-free call companion. That said, users expecting advanced codec support, noise isolation, or a broad suite of smart features will find the spec sheet relatively lean. For those whose priority is staying connected to their surroundings while maintaining reliable wireless audio and call capability, the OpenFly 2 Pro deliver a focused, functional package.

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