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Sennheiser HD 4.40 BT Technical Details

Connectivity
Connection Technology Wired
Bluetooth Yes
Bluetooth version 4.0
Bluetooth profiles APT-X
Near Field Communication (NFC) Yes
Headphone Connectors Supported 3.5mm Stereo
Earphones
Earphone Design Circumaural Ear Drawing
Headphone Frequency 18 - 22000 Hz
Headphone Sensitivity Sound Emission 113 DB
Impedance 18 Ω
Acoustic System Closed
Microphone
Microphone Direction Type Microphone Directional Type Omnidirectional
Microphone Frequency 100 - 10000 Hz
Indication
LED Indicators Yes
Packaging Content
Number of Products Included Quantity Per Main Board 1 Piece (S)
Cables Included Audio (3.5mm)
Carrying Case For Transport Yes
Fast Guide Yes
Packing Contents Case Yes
Warranty Card Yes
Battery
Battery Technology Lithium Polymer Polymer Technology (LiPo)
Design
Headset Type Stereophonic Earphone Type
Style of Use Style of Use. Auricle
Product Color Color of Product Black
Volume control Type of Digital Timer
Performance
Total Harmonic Distortion (THD) 0 - 5 °
Brand Compatibility Universal Use Environment