Specifications:

Ear coupling: Around the ear

Transducer principle: dynamic

Acoustic principle: closed

Cable length: 1.4m

Weight: 227g

Frequency response (speaker): 17 Hz to 23,000 Hz

Impedance: Active: 490 Ω, Passive: 46 Ω

Sound pressure level (Sound pressure level): 110 dB (1kHz/ 1 V)

Total harmonic distortion (THD): < 0.5 %

Microphone pick-up pattern: 3-mic beamforming array

Transducer size: 32 mm

Charging time:3 hrs

Operating time:30 hrs

Bluetooth version: Bluetooth 5.0

Bluetooth profiles: AVRCP, A2DP, HFP, HSP, DIP

Bluetooth audio codec: AptX™, AptX™ low Latency, AAC, SBC

Active noise cancellation: Yes

Driver: 32mm dynamic driver x 2

Features:

 - Customized Sound

 - Exceptional battery performance up to 30 hours

 - Adaptive noise cancellation and Transparent Hearing

 - Touchpad control

 - Smart Pause (activated via the app) and Auto On/Off 

Upgrade to a smarter travel experience:

Travel the world on a single charge with 30 hours of battery life, unrivalled Sound quality and wireless freedom.

Create your ideal travel conditions:

Adaptive noise cancellation adjusts to your surroundings while the voice Assistant Button seamlessly connects you to virtual assistants.

Seamless and practical - Smart Pause and smarter ways to connect while on the move:

The PXC 550-II microphone system is pretty decent. Sennheiser opted for a triple-microphone array in tandem with noise-cancelling technology to reduce background noise while transmitting clear audio 

Gesture controls during media playback:

Rotate the right ear cup to turn the headset on and off.

Press and hold the voice assistant button for four seconds to initiate pairing mode.

Tap the touchpad once to play/pause media.

Swipe horizontally and hold to fast forward and rewind playback.

Swipe horizontally to skip or go to the previous track.

Swipe vertically to increase and decrease the volume.

Slide the ANC slider up one or two clicks to adjust noise-cancelling intensity.

Here is a list of gesture controls for calls: Tap once to accept or end a call.

Tap and hold to reject an incoming call.

Double-tap to place a call on hold.

Swipe horizontally to mute or unmute the microphone.

Swipe vertically to adjust the volume.

What's in the box:

1 x PXC 550-II headphones

1 x Carry case

1 x USB charging cable (Micro USB to USB A)

1 x Audio cable

1 x Quick guide and safety guide