Koss GMR-540-ISO

6 h, Cable, Wireless
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Delivered between Tue, 28.7. and Tue, 4.8.
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Product details

The Koss GMR-540-ISO. in-ear headphones offer a versatile audio experience for general use. With a wired design and robust construction, these headphones are ideal for everyday use. They have a frequency range of 18 to 20,000 Hz, which enables clear and precise sound reproduction. The headphones are equipped with a 1.2 metre cable for comfortable use, while the integrated microphone facilitates communication. The sensitivity of 101 dB ensures that the audio output is loud and clear, while the maximum noise level limit of 103 dB ensures a comfortable listening experience. These headphones are an excellent choice for anyone who values quality and comfort.

  • Wired design for reliable signal transmission
  • Frequency range from 18 to 20,000 Hz for clear sound reproduction
  • Integrated microphone for easy communication
  • Lightweight 220 grammes for high wearing comfort.

Key specifications

Equipment + Functions
Microphones
Signal transmission
Cable, Wireless
Headphone type
Bluetooth headphones, In-ear headphones

General information

Item number
9924271
Manufacturer
Koss
Category
Headphones
Manufacturer No.
KOSS GMR-540-ISO USB
Release date
19.10.2018

Colour

Colour
Black
Exact colour description
Black/Red

Headphone properties

Equipment + Functions
Microphones
Signal transmission
Cable, Wireless
Button functions
Volume Up

Headphone type

Headphone type
Bluetooth headphones, In-ear headphones
Fit
Headband

Audio properties

Frequency range
15 - 22000 Hz
Sensitivity
101 dB
Max. noise level
103 dB
Impedance
35 Ω

Audio cable properties

Headphone cable length
1.2m (incl. Remomte/Mic)

Bluetooth features

Bluetooth version
4.2

Power supply

Power supply
Battery operated

Battery properties

Battery type
Li-ion
Battery life
6 h
Charging input
USB Type-A

Voluntary climate contribution

CO₂ emissions
29.26 kg
Climate contribution
CHF 0.70

Scope of delivery

Scope of delivery
Three cushion sizes included (small, medium & large)

Product dimensions

Weight
220 g

30-day right of return
24 Months Warranty (Bring-in)
1 additional offer

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «Headphones» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • 38.Cellularline
    1.8 %
  • 38.Intenso
    1.8 %
  • 38.Koss
    1.8 %
  • 38.Motorola
    1.8 %
  • 42.Apple
    1.9 %

Warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Digitec Galaxus
  • 56.Creative
    2 days
  • 56.Denon
    2 days
  • 56.Koss
    2 days
  • 56.Marshall
    2 days
  • 56.Motorola
    2 days

Return rate

How often is a product of this brand in the «Headphones» category returned?

Source: Digitec Galaxus
  • 63.Usams
    3.1 %
  • 67.Avantree
    3.2 %
  • 67.Koss
    3.2 %
  • 67.Skullcandy
    3.2 %
  • 70.Bose
    3.3 %
Source: Digitec Galaxus