Sennheiser HD 4.40 BT

Weight: 225 g
Design: Full size
Description: Design: full-size, device type: wireless headphones, design features: microphone, functions: NFC, volume control, operating time: 25 h, supported codecs: aptX
Additional Information: Battery type: own Li-Ion; Case included: yes; Call waiting/holding: yes; Answer/End Call: Yes
Harmonic coefficient: 0.5 %
Functions: NFC, volume control
Working hours: 2.5 h
Battery capacity: 600 mAh
Impedance: 18 ohm
Sensitivity: 113 dB
Design features: Microphone
Charging time: 2 h
Device type: Wireless headphones
Mount type: Headband
Maximum playback frequency: 22000 Hz
Minimum repeatable frequency: 18 Hz
Technology: Dynamic
Bluetooth version: 4.0
Supported codecs: aptX
Wireless connection type: Bluetooth