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Red over-ear headphones with padded cups, adjustable headband, foldable design

Mi B15 Over-Ear Headphones Red 68H Bluetooth

SKU CH-C5QY-TG1Z9

Over-ear wireless headphones with 68-hour battery, built-in microphone, foldable design and 3.5 mm aux input

  • TypeOver the Ear
  • ColorRed
  • Driver Unit40 millimeters
  • Frequency Response5Hz-20KHz
  • THDOver Ear
  • Input Impedance32 ohms
  • 68 hours of wireless playtime between charges
  • 40 mm drivers deliver 5 Hz–20 kHz frequency response
  • Foldable 0.44 lb frame with adjustable headband for comfort
  • Built-in mic enables hands-free calls and meetings
  • 5 mm aux cable adds wired listening option

Mi B15 Over-Ear Wireless Headphones

The Mi B15 is a foldable over-ear headphone with Bluetooth wireless connectivity and a 3.5 mm wired option. It suits commuters, office workers and students who want a single headset for music, calls and video meetings across phones, tablets and laptops. The adjustable headband and soft ear pads support long sessions without fatigue. Buyers who need active noise cancellation or multi-point pairing should look elsewhere.

Battery Life and Audio Headroom

The internal lithium-ion battery delivers up to 68 hours of operating time and recharges in about 2 hours. Six selectable EQ modes cover pop, rock, bass, vocal, podcast and video profiles, while the 40 mm drivers produce a 5 Hz to 20 kHz frequency response at 105 dB sensitivity. The 32 ohm impedance makes them easy to drive from portable sources. Bass-heavy listeners may find the low-end extension limited compared to larger closed-back models.

Build Integration and Practicality

Weighing 0.44 pounds, the headset folds flat for compact storage in a backpack or desk drawer. Bluetooth range reaches 33 feet, freeing movement during calls or pacing while listening. The detachable 3.5 mm cable provides a fallback when the battery is depleted or when connecting to in-flight entertainment systems. No proprietary app or dongle is required for basic operation.

Highlights

  • 68 hours of wireless playtime between charges
  • 40 mm drivers deliver 5 Hz–20 kHz frequency response
  • Foldable 0.44 lb frame with adjustable headband for comfort
  • Built-in mic enables hands-free calls and meetings
  • 5 mm aux cable adds wired listening option

Specifications

BrandMi
ModelB15, MID-B15
TypeOver the Ear
ColorRed
Driver Unit40 millimeters
Frequency Response5Hz-20KHz
THDOver Ear
Input Impedance32 ohms
Signal to Noise Ratio(SNR)105 decibels
Power Supplylithium_ion, nonstandard_battery, false
Sensitivity105 decibels
Connector3.5mm
Ear Couplingover_ear
Weight0.44 pounds
Noise Cancellingsound_isolation
Wireless TypeBluetooth
Battery68 hours
Operating Time68 hours
Charge Time2 hours
Distance33 feet
Microphone Impedance~3K ohm
Microphone Frequency Response20Hz-20KHz
Microphone Signal to Noise Ratio(SNR)105 decibels
Microphone Sensitivity105 decibels
Featuressound_isolation, 5.3, 68 hours, Detachable, Volume Control, touch, Over Ear, dynamic_driver, 32 ohm, 33 feet

Questions about this item

Will the 3.5 mm cable let me keep using the B15 with an older laptop that has no Bluetooth?

Yes — the 3.5 mm aux connector works as a passive wired link, so the headphones play audio from any device with a standard headphone jack without needing battery power.

How can I confirm the 40 mm drivers are delivering the 5 Hz–20 kHz range after pairing?

Play a frequency-sweep track; you should hear clean output down to the lowest bass and up to the highest treble without distortion at moderate volume.

Does the box include a USB charging cable and the 3.5 mm audio cable, or do I buy them separately?

The package supplies a USB charging cable and a 3.5 mm aux cable, so both wireless and wired use are ready out of the box.

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