For sale is Sennheiser EPOS Adapt 660 Wireless noise cancelling headphones as shown in photos and in Excellent condition only used a few times with All Original Cables and dongle, no scratches. Superb Signature Sennheiser sound with over 30 hours of battery life, touchpanel and Supreme comfort even over long listening sessions. Active white noise suppression and Smartphone app make for a truly immersive listening experience. Highly rated headphones and RRP £299.

Grab a bargain from trusted eBayer. Good luck and Happy bidding.

Full spec list as follows ;
Product data
General
Wearing style
Over-ear, double-sided headband
Headset weight
227g / 8 oz.
Transducer principle
Dynamic, closed
Connectivity
Bluetooth® 5.0. audio cable (2.5 mm and 3.5 mm jack plugs).
USB-A/USB-C cable with micro-USB connector
Supported codecs
AptX™, AptX™ low latency, AAC, SBC
Warranty
2 years
Audio
Speaker frequency response
17 - 23,000 Hz
Microphone type
Digital MEMs beamforming microphone (3 microphones)
Microphone frequency response
150 - 6,800Hz
Impedance active
490 ohms / Passive 46 ohms
Sound pressure level (SPL)
Max. 118 dB limited by EPOS ActiveGard®
Total harmonic distortion (THD)
<0.5% (1kHz, 100dB)
Contact pressure
3N
Noise cancellation
Hybrid adaptive ANC technology with 4 microphones
Total noise attenuation
Up to 30 dB

Technical
Charging time
3 hours
Standby time
Up to 15 days
Battery time
Up to 30 hours*
Range
Up to 25 m / 82 ft (device dependent)
Touch control
Yes
Voice prompts
Yes (EN, DE, FR, ES, ZH, JA, KO)
Sound effect modes
Yes (club, movie, speech, director-user defined)
Content of delivery
What's in the box ADAPT 660 AMC headset, BTD 800 USB-A dongle, USB cable with micro-USB connector, audio cable (2.5 mm and 3.5 mm jack
plugs), carry case, safety guide, compliance sheet