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Black on-ear headphones with padded headband and 9-foot cord

Plantronics Hi-Fi On-Ear Headset 40mm 9ft 3.5mm K33137

SKU CH-EV24-0A8RN

Wired on-ear headset with 40 mm drivers, padded headband, 9 ft cable and 3.5 mm jack for classroom use

  • ColorBlack
  • Compatible Phone ManufacturerSamsung
  • Wearing StyleIn-Ear
  • Connector3.5mm
  • Driver8 mm
  • Output PowerFoldable, -20 decibels
  • Powerful 40mm drivers deliver deep bass and wide dynamic range
  • Padded headband and plush sealed earpads provide comfort for extended sessions
  • Robust 9-foot cord with gold-plated 3.5mm plug withstands heavy daily use
  • Flexible earcups allow single-sided monitoring for situational awareness
  • Designed for classroom learning with durable construction and safe 94db maximum output

On-Ear Headset with 40mm Drivers

The Plantronics K33137 is a wired on-ear headset built around 40mm drivers that deliver deep bass and a wide dynamic range. It is designed for students and educators who need clear audio for classroom learning, testing and multimedia lessons. The 3.5mm gold-plated plug works with any device that offers a standard headphone jack.

9-Foot Cord and Adjustable Fit

A robust 9-foot cable gives freedom to move around a desk or lab station without pulling the source device. Flexible earcups rotate for single-sided monitoring so a teacher can hear the room while audio plays. The padded headband and plush sealed earpads adjust to fit a wide range of head sizes for extended sessions.

Sustained Comfort and Safe Volume

Passive noise isolation from the sealed earpads keeps external sound out, letting the driver output stay at or below 94dB for safer long-term listening. The lightweight frame and soft-touch materials reduce pressure during multi-hour use. Durable construction resists daily wear in shared environments.

Highlights

  • Powerful 40mm drivers deliver deep bass and wide dynamic range
  • Padded headband and plush sealed earpads provide comfort for extended sessions
  • Robust 9-foot cord with gold-plated 3.5mm plug withstands heavy daily use
  • Flexible earcups allow single-sided monitoring for situational awareness
  • Designed for classroom learning with durable construction and safe 94db maximum output

Specifications

BrandPLANTRONICS
ModelHuawei Ascend G6
ColorBlack
Part Number33137
Compatible Phone ManufacturerSamsung
Wearing StyleIn-Ear
Connector3.5mm
Driver8 mm
Output PowerFoldable, -20 decibels
Impedance32 ohm
Volume ControlIn-Line
SpecificationsK33137, Black, 6.5 L x 6.1 W x 2.3 H inches, 1 ounces, Retractable, 3.5 mm Jack, Wired, 1 Year, passive_noise_cancellation, On-ear, On Ear
FeaturesSoft Touch
Dimension14.33in W x 12.83in H x 9.06in D
Weight1 ounces
Sports Team1 Piece
Sports LeagueNewbee

Questions about this item

How long can I listen at the 94 dB maximum before it becomes a hearing-safety concern?

The 94 dB limit is set for safe listening during typical classroom sessions; continuous exposure at that level should follow standard occupational-health guidelines for duration.

Does the 32 ohm impedance and 9-foot cord cause noticeable heat or power draw during all-day use?

The passive 32 ohm design draws minimal power from the source device and produces no heat, while the 9-foot cord adds no active circuitry that would warm up.

What device connector must I already have for the gold-plated 3.5 mm plug to work?

Any device with a standard 3.5 mm audio jack — laptop, tablet, phone or desktop — will accept the gold-plated plug directly.

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