Sennheiser HD440BT Bluetooth Circuit Headphones

Sennheiser closed wireless headphones with Bluetooth 4.0 and aptX codec. 25 hours of battery, NFC pairing and 3.5 mm audio cable included for cable use when the battery runs out. Folding design with swivel cup for a single ear listening.

Ideal for: Users looking for Sennheiser's over-ear Bluetooth headset with the extra comfort of the backup audio cable. Ideal for Android users with aptX compatible devices for higher audio quality. No active noise cancellation.

Technical characteristics:

• Headphone type and usage: Circumaural (over-ear) closed wireless. Daily use, mobility, home.
• Frequency response: 18 Hz – 22,000 Hz.
• Sensitivity / Maximum SPL: 113 dB.
• impedance: 18 Ω.
• Bluetooth: version 4.0.
• Codec: aptX, SBC.
• NFC: Yes (Instant Pairing Approaching the Phone).
• Battery: 25 hours of playback. Full Charge Time: Approx. 2 h.
• Charge: micro-USB.
• Cable type: 3.5mm audio cable included (using by cable when battery discharged).
• Cable length: 1.4 m.
• Audio Connector Type: 3.5mm mini jack.
• Built-in microphone: Yes, for calls.
• DESIGN: Foldable. Rotating cup for monophonic listening. Color: Black.
• Active Noise Cancellation (ANC): Does not include.
• Net Weight: approx. 225g.
• Gross weight (with packaging): approx. 500g.

Connection and use: Pair headphones via Bluetooth 4.0 or NFC by zooming in on the compatible phone. For higher quality audio, make sure your Android device supports aptX. When the battery runs out, connect the included 3.5 mm cable to continue using the headphones without interruption.