SENNHEISER HD 4.40BT wireless headphones


HD 4.40BT wireless headphones


HD 4.40BT wireless headphones



HD 4.40BT wireless headphones Product Information

  • Closed circumaural design featuring Bluetooth® wireless technology

  • Robust, foldable headband for easy storage on the go

  • Immediate pairing to smart devices using NFC

  • Up to 25 hours battery life

  • Comes with an attachable audio cable for use in environments where

  • Bluetooth® connectivity is not permitted

  • Sennheiser – the name stands for the establishment and development of trends. Its achievements have won numerous international awards: two innovation prizes of German industry, the “ Technical Oscar ’ (The Scientific and Engineering Award), a Grammy and the most significant television prize in the USA, the Emmy Award.

  • The trailblazing ideas of developers have made Sennheiser products famous throughout the world, and repeatedly met with an enthusiastic response from audio aficionados.

Technical Specification
  • Ear coupling closed, circumaural

  • Frequency response 18 - 22,000 Hz

  • Transducer principle dynamic

  • Sensitivity (microphone) 100 - 10,000 Hz

  • Sound pressure level (SPL) 113 dB (1 kHz/ 1 Vrms)

  • Impedance 18 Ω

  • THD (1 kHz, 100 dB) 0.5 %

  • Pick-up pattern dual omni-directional microphones

  • Input power 3.7 VDC, 600 mAh: built-in rechargeable

  • Lithium-Polymer battery

  • 5 VDC, 400 mA: USB charging

  • Operating time 25 hours

  • Charging time approx. 2 hours

  • Weight approx. 225 g

  • Battery Lithium Polymer

  • Connectivity Bluetooth version 4.0/NFC pairing

  • Audio cable

  • (optional/detachable)

  • 1.4 m audio cable, 3.5 mm angled plug,

  • gold-plated

  • Connector USB charging cable

In the Package
  • 4.4 Headphone x 1

  • Premium carrying case x 1

  • Audio cable with 2.5 mm and 3.5 mm jack plug x 1

  • USB charging cable with micro-USB connector x 1

  • Quick guide x 1

  • 24 months

^Any items in product photos and videos but not stated in “In the Package” are for illustration only.

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