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Freemotion B571 Bluetooth Wireless On Ear Headphones with Radio with 9 hours of Operation Gray
Headphones

Freemotion B571 Bluetooth Wireless On Ear Headphones with Radio with 9 hours of Operation Gray

The Defender Freemotion B571 headphones connect wirelessly via Bluetooth and feature foldable ear cups for easier portability. The built-in microphone and control buttons let you manage calls and...

The Defender Freemotion B571 headphones connect wirelessly via Bluetooth and feature foldable ear cups for easier portability. The built-in microphone and control buttons let you manage calls and change tracks without handling your phone. The Micro-SD card slot lets you play music without connecting to a smartphone or laptop, while the wired connection lets...

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Top specs

  • Microphone

    The headphones feature a built-in microphone.

  • Foldable Ear Cups

    Folding ear cups help reduce the volume of headphones, making them easier to transport.

    Headphones with folding ear cups often come with a carrying case.

    1
  • Connectivity Bluetooth

  • Noise Cancellation

    The method of reducing external noise that the headphones have.

    Active Noise Cancellation (ANC): Uses technology to detect and neutralize external noises, offering clearer sound.

    Passive Noise Cancellation: The shape and materials of the headphones naturally reduce external noises, improving the listening experience.
  • See all
21 00 €
Delivery by Thu, 05 Nov
2,50 € to a Skroutz Point
or   3,50 €   shipping cost
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From Zevgaras 4.9 (8)
4.9 (8 reviews)
Καρδίτσα, Καρδίτσας
In-store pickup available
1 piece
See Earphones on the page of Zevgaras
What if it breaks?

You're covered by the statutory 2-year warranty. Contact us and we'll handle the entire process with the store, ensuring your issue is resolved with prompt support through a repair, replacement, or refund.

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Charger not included

A charger is not included in the package.
Product report

Description

Description

The Defender Freemotion B571 headphones connect wirelessly via Bluetooth and feature foldable ear cups for easier portability. The built-in microphone and control buttons let you manage calls and change tracks without handling your phone. The Micro-SD card slot lets you play music without connecting to a smartphone or laptop, while the wired connection lets you keep listening when the battery runs out.

The ear cups have a diameter of 40 mm, and passive noise cancellation helps reduce external sounds. Battery life is up to 9 hours, while the built-in radio lets you listen to radio stations.

  • Type: On-ear
  • Connectivity: Bluetooth
  • Connection type: Wireless and wired
  • Frequency response: 20 - 20000 Hz
  • Sensitivity: 115 dB
  • Ear cup diameter: 40 mm
  • Microphone: Built-in
  • Volume controls: Built-in
  • Foldable ear cups: Yes
  • Detachable cable: Yes
  • Noise cancellation: Passive
  • Radio: Built-in
  • Card slot: Micro-SD
  • Battery life: Up to 9 hours
  • Color: Gray
  • Weight: 200 g

Manufacturer

Manufacturer Details

Warnings & Safety Information
See full description

Specifications

Specifications

Product Details

Type
On Ear

Type

On Ear

Headphones with smaller ear cups compared to over-ear headphones, which sit on the ears.

They are more portable due to their smaller size, but offer less comfort and isolation from external noise.

Generally, over-ear headphones, thanks to their larger speakers, can offer better sound quality and deep bass compared to on-ear headphones of similar quality.
Frequency Response
20 - 20000 Hz

Frequency Response

The range of frequencies that headphones can reproduce. The most common range is that of human hearing, 20 - 20000 Hz. A wider frequency range does not necessarily mean better sound quality.

  • (Bass) 20-250 Hz: Stronger bass, for depth. Ideal frequencies for listening to electronic or hip hop music.
  • (Mids) 250-4,000 Hz: The mid frequencies are stronger, suitable for better listening to vocals or orchestral music.
  • (Treble) 4,000-20,000 Hz: High frequencies affect the clarity and sharpness of the sound, for better listening to, for example, cymbals or the plucking of classical guitar strings.
Sensitivity
115 dB

Sensitivity

The greater the sensitivity of the headphones, the louder they will sound at a specific volume of the source. Generally, values above 90db are considered very good. - **Above 100db**: Headphones with high Sensitivity produce more sound with less power. They can reach high volumes with low-power devices (e.g., mobile phone, laptop). - **Below 100db**: Headphones with low Sensitivity require more power to reach the same volume levels, so they may need a special headphone amplifier
Driver Diameter
40 mm

Driver Diameter

The diameter of the headphones' speakers. Usually, the larger the diameter, the more powerful sound with full bass they can offer.
Playing Time
9 hours
Colour
Grey
Weight
200 gr

Connectivity

Wireless Connections
Bluetooth

Wireless Connections

Bluetooth
They connect wirelessly to devices that also have Bluetooth such as PC, laptop, smartphone or tablet.
Connection
Wireless & Wired

Features & Functions

Microphone
Yes

Microphone

The headphones feature a built-in microphone.
Volume Control
Yes

Volume Control

The headphones feature a built-in control for sound volume.
Detachable Cable
Yes

Detachable Cable

The connection cable can be removed from the headphones.

The main advantage is that in case the cable is damaged, it can be easily replaced without needing to buy new headphones. Additionally, wireless headphones can be used as wired ones when the battery is low.
Foldable Drivers
Yes

Foldable Drivers

Folding ear cups help reduce the volume of headphones, making them easier to transport.

Headphones with folding ear cups often come with a carrying case.
Rotating Capsules
No

Rotating Capsules

Rotating ear cups allow headphones to have a flat shape, making them easier to transport (e.g. in a suitcase).
Card Reader
Yes
Radio
Yes
Fast Charging
No

Fast Charging

The fast charging feature allows the headphones to gain sufficient autonomy with just a few minutes of charging, ideal for use when time is limited.
High-Resolution Audio
No
Connection with 2 Devices
No
Noise Cancellation
Passive

Noise Cancellation

The method of reducing external noise that headphones have.

Passive

The design and material of the acoustic block out unwanted external noise, allowing you to hear better.

Top Specs

Connectivity
Bluetooth
Noise Cancellation
Passive Noise Cancellation

Noise Cancellation

The method of reducing external noise that the headphones have.

Active Noise Cancellation (ANC): Uses technology to detect and neutralize external noises, offering clearer sound.

Passive Noise Cancellation: The shape and materials of the headphones naturally reduce external noises, improving the listening experience.

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

See all specifications

Reviews (1)

Reviews

5.0
1
5.0
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  1. 1
  2. 4 stars
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  3. 3 stars
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  4. 2 stars
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  5. 1 star
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Questions

Questions

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Description & Specifications

The Defender Freemotion B571 headphones connect wirelessly via Bluetooth and feature foldable ear cups for easier portability. The built-in microphone and control buttons let you manage calls and change tracks without handling your phone. The Micro-SD card slot lets you play music without connecting to a smartphone or laptop, while the wired connection lets you keep listening when the battery runs out.

The ear cups have a diameter of 40 mm, and passive noise cancellation helps reduce external sounds. Battery life is up to 9 hours, while the built-in radio lets you listen to radio stations.

  • Type: On-ear
  • Connectivity: Bluetooth
  • Connection type: Wireless and wired
  • Frequency response: 20 - 20000 Hz
  • Sensitivity: 115 dB
  • Ear cup diameter: 40 mm
  • Microphone: Built-in
  • Volume controls: Built-in
  • Foldable ear cups: Yes
  • Detachable cable: Yes
  • Noise cancellation: Passive
  • Radio: Built-in
  • Card slot: Micro-SD
  • Battery life: Up to 9 hours
  • Color: Gray
  • Weight: 200 g

Manufacturer

Manufacturer Details

Warnings & Safety Information

Product Details

Type
On Ear

Type

On Ear

Headphones with smaller ear cups compared to over-ear headphones, which sit on the ears.

They are more portable due to their smaller size, but offer less comfort and isolation from external noise.

Generally, over-ear headphones, thanks to their larger speakers, can offer better sound quality and deep bass compared to on-ear headphones of similar quality.
Frequency Response
20 - 20000 Hz

Frequency Response

The range of frequencies that headphones can reproduce. The most common range is that of human hearing, 20 - 20000 Hz. A wider frequency range does not necessarily mean better sound quality.

  • (Bass) 20-250 Hz: Stronger bass, for depth. Ideal frequencies for listening to electronic or hip hop music.
  • (Mids) 250-4,000 Hz: The mid frequencies are stronger, suitable for better listening to vocals or orchestral music.
  • (Treble) 4,000-20,000 Hz: High frequencies affect the clarity and sharpness of the sound, for better listening to, for example, cymbals or the plucking of classical guitar strings.
Sensitivity
115 dB

Sensitivity

The greater the sensitivity of the headphones, the louder they will sound at a specific volume of the source. Generally, values above 90db are considered very good. - **Above 100db**: Headphones with high Sensitivity produce more sound with less power. They can reach high volumes with low-power devices (e.g., mobile phone, laptop). - **Below 100db**: Headphones with low Sensitivity require more power to reach the same volume levels, so they may need a special headphone amplifier
Driver Diameter
40 mm

Driver Diameter

The diameter of the headphones' speakers. Usually, the larger the diameter, the more powerful sound with full bass they can offer.
Playing Time
9 hours
Colour
Grey
Weight
200 gr

Connectivity

Wireless Connections
Bluetooth

Wireless Connections

Bluetooth
They connect wirelessly to devices that also have Bluetooth such as PC, laptop, smartphone or tablet.
Connection
Wireless & Wired

Features & Functions

Microphone
Yes

Microphone

The headphones feature a built-in microphone.
Volume Control
Yes

Volume Control

The headphones feature a built-in control for sound volume.
Detachable Cable
Yes

Detachable Cable

The connection cable can be removed from the headphones.

The main advantage is that in case the cable is damaged, it can be easily replaced without needing to buy new headphones. Additionally, wireless headphones can be used as wired ones when the battery is low.
Foldable Drivers
Yes

Foldable Drivers

Folding ear cups help reduce the volume of headphones, making them easier to transport.

Headphones with folding ear cups often come with a carrying case.
Rotating Capsules
No

Rotating Capsules

Rotating ear cups allow headphones to have a flat shape, making them easier to transport (e.g. in a suitcase).
Card Reader
Yes
Radio
Yes
Fast Charging
No

Fast Charging

The fast charging feature allows the headphones to gain sufficient autonomy with just a few minutes of charging, ideal for use when time is limited.
High-Resolution Audio
No
Connection with 2 Devices
No
Noise Cancellation
Passive

Noise Cancellation

The method of reducing external noise that headphones have.

Passive

The design and material of the acoustic block out unwanted external noise, allowing you to hear better.

Top Specs

Connectivity
Bluetooth
Noise Cancellation
Passive Noise Cancellation

Noise Cancellation

The method of reducing external noise that the headphones have.

Active Noise Cancellation (ANC): Uses technology to detect and neutralize external noises, offering clearer sound.

Passive Noise Cancellation: The shape and materials of the headphones naturally reduce external noises, improving the listening experience.

Important information

Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.

Reviews (1)

5.0
1
5.0
Review this product
  1. 1
  2. 4 stars
    0
  3. 3 stars
    0
  4. 2 stars
    0
  5. 1 star
    0
Review this product
21,00 €
2,50 € to a Skroutz Point
or   3,50 €   shipping cost
Defender