Defender FREEMOTION B571 LED Headset Wired & Wireless Head-band Calls/Music/Sport/Everyday Bluetooth Grey Wireless Bluetooth, 2.402-2.48GHz, 40mm, 115dB, 20-20000Hz, -42dB, 20-20000Hz, 10m, 9h, 400mAh, micro-USB, 175x75x185mm, 200g
Performance
Product typeHeadset
Microphone typeBuilt-in
Recommended usageCalls/Music/Sport/Everyday
Compatible memory cardsMicroSD (TransFlash)
Sound pressure level (max)115 dB
Backlight colourMulti
BacklightYes
Headset typeBinaural
Wearing styleHead-band
Product colourGrey
Volume controlButton
FoldableYes
Control unit typeOn-ear control unit
Control typeButtons
Operating keysAnswer/end call, Play/Pause, Track <, Track >, Volume +, Volume -
On/off switchYes
Intraaural headphones typeEarbuds
Detachable cableYes
Music playbackYes
Housing materialMetal, Plastic
Adjustable headbandYes
Technical details
Backlight colourMulti
BacklightYes
Headset typeBinaural
Wearing styleHead-band
Product colourGrey
FoldableYes
Sustainability complianceYes
Sustainability certificatesCE, RoHS
Design
Product typeHeadset
Microphone typeBuilt-in
Backlight colourMulti
BacklightYes
Headset typeBinaural
Wearing styleHead-band
Product colourGrey
Volume controlButton
FoldableYes
Control typeButtons
On/off switchYes
Ports & interfaces
Connectivity technologyWired & Wireless
3.5 mm connectorYes
BluetoothYes
Frequency band2.402 - 2.48 GHz
Wireless range10 m
Bluetooth version5.0+EDR
Bluetooth profilesA2DP, AVRCP, HFP, HSP
Frequency response (music mode)20 - 20000 Hz
Headphones
Sound pressure level (max)115 dB
Ear couplingSupraaural
Headphone frequency20 - 20000 Hz
Headphone sensitivity115 dB
Noise canceling typePassive
Intraaural headphones typeEarbuds
Diaphragm diameter4 cm
Noise cancelingYes
Microphone
Microphone typeBuilt-in
Microphone frequency100 - 16000 Hz
Microphone sensitivity-42 dB
Control unit
Control unit typeOn-ear control unit
Control typeButtons
Battery
Battery capacity400 mAh
Continuous audio playback time9 h
Battery technologyLithium Polymer (LiPo)
Battery operatedYes
Charging sourceUSB
Battery typeBuilt-in battery
Music player
Compatible memory cardsMicroSD (TransFlash)
Sustainability
Sustainability complianceYes
Sustainability certificatesCE, RoHS
Weight & dimensions
Weight200 g
Width175 mm
Height185 mm
Depth75 mm
Packaging data
Package width170 mm
Package typeHanging box
Package height154 mm
Package depth89 mm
Package weight310 g
Logistics data
Master (outer) case width550 mm
Master (outer) case length360 mm
Master (outer) case height325 mm
Master (outer) case gross weight8.5 kg
Products per master (outer) case24 pc(s)
Other features
Sound pressure level (max)115 dB
Backlight colourMulti
BacklightYes
Volume controlButton
Package typeHanging box
Continuous audio playback time9 h
Bluetooth version5.0+EDR
Bluetooth profilesA2DP, AVRCP, HFP, HSP
On/off switchYes