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boAt Airdopes 138 Gen 2 specifications and in-depth review

boAt Airdopes 138 Gen 2

Manufacturer: boAt

The boAt Airdopes 138 Gen 2 are true wireless earbuds designed for everyday use without the hassle of cables. They carry an IPX4 rating, making them resistant to sweat during workouts or commutes. With stereo sound delivered through a 13 mm driver, the earbuds cover the standard 20 Hz to 20,000 Hz frequency range and are paired with a four-microphone setup that includes noise cancellation for clearer calls. Voice prompts, a mute function, and touch controls on the device round out the everyday usability features.

On the power side, each earbud holds a 40 mAh battery rated for 10 hours of playback, while the 650 mAh charging case extends total usage to 60 hours. Fast charging is supported, and the case uses USB Type-C for recharging. Bluetooth 5.4 handles the wireless connection with a stated range of up to 10 m and an audio latency of 45 ms. The earbuds also ship with a travel bag and carry a one-year warranty.

Pros
  • The charging case offers a total of 60 hours of battery life, reducing how often the case itself needs to be recharged
  • Fast charging support means less time waiting before the earbuds are ready to use
  • A four-microphone setup with noise cancellation helps deliver cleaner audio during calls
  • The earbuds can be used as a headset and include a mute function, adding practical call-handling flexibility
  • A travel bag is included in the box, making transport and storage more convenient
  • Bluetooth 5.4 provides a modern wireless connection with a 45 ms audio latency
Cons
  • Neither active noise cancellation nor passive noise reduction is available, meaning external sounds are not blocked during listening
  • No in-ear detection, so music does not pause automatically when the earbuds are removed
  • Wireless charging is not supported, requiring a wired connection every time the case needs power
  • No advanced audio codecs such as LDAC, aptX, or AAC are included, limiting audio streaming quality options
  • There is no find-device feature to help locate misplaced earbuds
  • Fast pairing is not supported, so connecting to a new device requires a manual pairing process
Who is this for?

These earbuds are a practical fit for users who want a true wireless experience for everyday commuting or light workouts, thanks to the IPX4 sweat resistance and cable-free design. The four-microphone setup with noise cancellation makes them well suited for people who regularly take calls on the go, while the 60-hour total battery life from the case suits those who prefer to go days between charges. The included travel bag and device-mounted controls add convenience for users who keep things simple and portable.

Who is this NOT for?

Users who prioritize audio fidelity will find the lack of high-resolution codecs such as LDAC or aptX a notable limitation, making these earbuds a poor match for discerning listeners who demand lossless or near-lossless wireless audio. Those who frequently use earbuds in loud environments will also be underserved, as there is no active or passive noise isolation to block ambient sound. Additionally, users who rely on smart features like automatic ear detection, ambient sound passthrough, or a find-device function for daily convenience will find those capabilities absent here.

Design:

Fit Earbud
Ingress Protection (IP) rating IPX4
water resistance Sweat resistant
has no wires or cables ✓
are neckband earbuds ✕
wingtips included ✕
has RGB lighting ✕
has stereo speakers ✓
has UV light ✕
Has a display ✕

The boAt Airdopes 138 Gen 2 follow a standard true wireless earbud design, meaning there are no cables or neckband connecting the two units. They carry an IPX4 ingress protection rating, offering resistance to sweat, which makes them suitable for physical activity. Stereo sound is supported, while features like wingtips, 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 13 mm
lowest frequency 20 Hz
highest frequency 20000 Hz
supports spatial audio ✕
has Dolby Atmos ✕
has Dirac Virtuo ✕
has a neodymium magnet ✕

The boAt Airdopes 138 Gen 2 use a 13 mm driver unit and cover a frequency range of 20 Hz to 20,000 Hz. Neither active noise cancellation nor passive noise reduction is included. Advanced audio technologies such as spatial audio, Dolby Atmos, Dirac Virtuo, and a neodymium magnet are also absent from this model.

Power:

Battery life 10 hours
Battery life of charging case 60 hours
charge time 2 hours
battery power 40 mAh
battery power (charging case) 650mAh
has wireless charging ✕
Has a solar power battery ✕
has a battery level indicator ✓
has a rechargeable battery ✓

Each earbud holds a 40 mAh rechargeable battery rated for 10 hours of playback, while the 650 mAh charging case extends the total to 60 hours. A full charge takes 2 hours, and a battery level indicator is included to keep track of remaining power. 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 ✕
audio latency 45 ms
has aptX Voice ✕
has Auracast ✕
maximum Bluetooth range 10 m
supports Bluetooth pairing using NFC ✕
Can be used wirelessly ✓
has AAC ✕

The earbuds connect wirelessly via Bluetooth 5.4 with a maximum range of 10 m and an audio latency of 45 ms. The charging case uses USB Type-C for wired charging. Advanced audio codecs including LDAC, LDHC, AAC, aptX, aptX HD, aptX Adaptive, aptX Low Latency, aptX Lossless, and aptX Voice are not supported, nor are Bluetooth LE Audio, Auracast, NFC pairing, or fast pairing.

Features:

has ambient sound mode ✕
has in/on-ear detection ✕
has find device feature ✕
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 ✓
warranty period 1 years
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 boAt Airdopes 138 Gen 2 support fast charging and can function as a headset for calls, with a mute function and voice prompts included for hands-free convenience. Controls are placed directly on the device, though there is no in-line control panel. A travel bag is included in the box, and the earbuds come with a one-year warranty. Features such as ambient sound mode, in-ear detection, a find-device function, notification readout, a built-in translator, a temperature sensor, and a camera remote are not part of this model.

Microphone:

number of microphones 4
has a noise-canceling microphone ✓

The boAt Airdopes 138 Gen 2 feature a four-microphone setup with noise cancellation to help reduce background sounds during calls and voice interactions.

Final Verdict

The boAt Airdopes 138 Gen 2 present a straightforward true wireless earbud option built around everyday practicality rather than audiophile-grade performance. Its most compelling strengths are the 60-hour total battery life paired with fast charging support and a four-microphone noise-canceling setup that makes it genuinely capable for call-heavy users. The absence of noise isolation, advanced audio codecs, and smart features like ear detection or find-device will naturally steer more demanding users elsewhere, but for those who simply want reliable wireless audio, sweat resistance, and long-lasting battery in a cable-free package, the Airdopes 138 Gen 2 delivers a focused, no-frills experience that aligns well with its intended use case.