Defender FreeMotion B550
 | Outdated Product Design: overhead, closed; full size Over-Ear; Connection type: combined; mini-Jack (3.5 mm); Bluetooth version: Bluetooth v4.0; Cable supply: single-sided; Range (m): 10; Detachable cable; Impedance (Ohm): 32; Frequency range (Hz): 20 – 20000; Sensitivity (dB): 105; Speaker size (mm): 40 |
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overhead, closed, combined, detachable cable, 3.5 mm, Bluetooth v5.3, foldable, 20 – 20000 Hz, 32 Ohm, battery: up to 32 h
overhead, closed, combined, detachable cable, 3.5 mm, Bluetooth, foldable, 20 – 20000 Hz, 32 Ohm, battery: 600 mAh, up to 35 h
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overhead, closed, combined, detachable cable, 3.5 mm, USB-C, Bluetooth v5.4, foldable, 20 – 20000 Hz, 32 Ohm, battery: 500 mAh, up to 50 h
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Defender FreeMotion B550
Type:full size (over-ear)
Connection:3.5 mm, Bluetooth v4.0
Frequencies:20 – 20000 Hz
Sensitivity:105 dB
Battery:up to 10 h
All specifications
Specifications FreeMotion B550
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E-Catalog UK editor, Headphones
Olexandr Cherkashche…, edited 08.04.2026
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Defender 2026 - new arrivals, bestsellers, and the most relevant models Defender.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Defender 2026 - new arrivals, bestsellers, and the most relevant models Defender.
Everything You Need to Know About Headphones: A Complete Technical GuideThe choice begins with understanding the design and features.
What characteristics should good headphones have?Guide to key features of headphones
Series Defender FreeMotion (wireless)Compare using chart →
gaming, built-in player, overhead, closed, combined, detachable cable, 3.5 mm, Bluetooth v5.3, foldable, 20 – 20000 Hz, 32 Ohm, battery: 800 mAh, up to 32 h, with case + 70 hours without backlight
built-in player, overhead, closed, combined, detachable cable, 3.5 mm, Bluetooth v5.0, foldable, 20 – 20000 Hz, battery: 200 mAh, up to 5 h
overhead, closed, combined, detachable cable, 3.5 mm, Bluetooth v5.3, foldable, 20 – 20000 Hz, 32 Ohm, battery: 200 mAh, up to 14 h
built-in player, overhead, closed, combined, detachable cable, 3.5 mm, Bluetooth v5.3, 20 – 20000 Hz, 32 Ohm, battery: 360 mAh, up to 30 h
overhead, closed, combined, detachable cable, 3.5 mm, Bluetooth v5.3, 20 – 20000 Hz, 32 Ohm, battery: 360 mAh, up to 14 h
overhead, closed, combined, detachable cable, 3.5 mm, Bluetooth v5.4, foldable, 20 – 20000 Hz, 32 Ohm, battery: 300 mAh, up to 50 h
overhead, closed, combined, detachable cable, 3.5 mm, Bluetooth v5.4, active noise cancellation, foldable, 20 – 20000 Hz, 32 Ohm, battery: 300 mAh, up to 50 h
Model overview based on user reviews
The Defender FreeMotion B550 headphones offer a decent sound quality and a 10-hour battery life, making them suitable for long trips. They connect reliably without glitches, which is impressive for their affordable price. However, some users have noted that the size could be slightly larger for a better fit. While one user found them satisfactory for travel, another experienced issues when using them with a computer, suggesting a potential defect or model limitation. Overall, they are a budget-friendly option with some variability in user experience.
Pros
Cons
Connects normally, there were no glitches. I go on shift, 10 hours on the road, a full charge is enough for my eyes, the sound is normal. The size would be a little bigger...  Slava Savin: use Defender FreeMotion B550 few months |
The device was purchased for use on a computer. Either it was defective, or the model itself is complete [censored]. I returned it to the store. Didn't have time to notice Everything worked fine with another headset.  Ivan Bezuglov: just bought Defender FreeMotion B550 |
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