defender FreeMotion B571 Wireless Stereo Headset Instructions
- June 15, 2024
- Defender
Table of Contents
FreeMotion B571
Wireless stereo headset
Functions

Charging

Connection

AUX mode

Turning off the backlight
![]()
How to headphone

WIRELESS STEREO HEADSET
Declaration of Conformity
Operation of device (devices) may be affected by strong static, electrical or
high-frequency fields (radio installations, mobile telephones, microwaves,
electrostatic discharges)/ If occurs, Try increasing the distance from the
devices causing the interface. Disposal of batteries, electrical and
electronic equipment r This sign on the product, its batteries or package
indicates that the product cannot jbe disposed together with domestic waste.
It should be delivered to an appropriate – batteries, electrical and
electronic equipment collecting and recycling company.
Terms and conditions of safe and efficient use of the product
Usage precautions:
- Use the product for its intended purpose only.
- Do not disassemble. This product does not contain parts that are entitled to self-sufficient repair. On the question of maintenance and replacement of a failed item apply to a dealer or Defender authorized service center. While receiving the product make sure that it is unbroken and there are no freely moving objects inside the product.
- Keep away from children under the age of 3. May contain small parts.
- Keep away from humidity. Never immerse the product in liquids.
- Keep away from vibrations and mechanical stresses, which can cause mechanical damaging of the product. In case of mechanical damage no warranties are provided.
- Do not use in the presence of visual damage. Do not use when the product is obviously defective.
- Do not use the product at temperatures below and above recommended temperatures (see the operation manual), under the conditions of humidity evaporation, as well as in hostile environment.
- Do not put into the mouth.
- Do not use the product for industrial, medical or manufacturing purposes.
- In case when shipment of the product was conducted in subzero temperatures, then before operating, the product should be kept in a warm placement ( +16-25C or 60- 77°F) within 3 hours.
- Turn off the device each time, when it is not planned to use it for extended period of time.
- Do not use the device while driving the vehicle, if it is diverted attention, and in other cases when the law obliges you to turn off the device.
Features
- LED backlight of headphones
- Built-in microphone
- MicroSD card slot
- Audio cable included
- Adjustable headband
- Compact foldable construction
- An option to connect to two devices simultaneously
- Up to 9 hours of battery operation time
- Metal headband base
Specification
- Bluetooth specification: V5.3 + EDR, A20P, AVRCP, HFP, HSP
- Membrane diameter: 40 mm
- Sensitivity (headphones): 115 dB
- Sensitivity (microphone): -42 dB
- Frequency response (headphones): 20-20000 Hz
- Frequency response (microphone): 100-16000 Hz
- Continuous talk/ listening period: 9hrs
- Connectors: Type-( for power
IMPORTER: Defender Technology OU, Betooni str 11, 11415, Tallinn, Estonia. Manufacturer: Guangdong Shengtena Technology Co., LTD. Address: Gounan Village Industrial Area, Gurao Town, Chaoyang District, Shantou, China. Made in China. Unlimited shelf life. Service life is 2 years. Date of manufacture: see on the package.
Manufacturer keeps the right to change package contents and specifications indicated in this manual. The latest and detailed operation manual is available at www.defender-global.com Made in China.
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>