Product introduction:

Sennheiser signature sound: hi-fi inspired 42mm driver aptX Adaptive

Custom Audio: Built-in equalizer, presets, sound modes and harmonic sound personalization for custom audio

Control your environment: Adaptive Noise Cancellation eliminates noise and adjustable transparency mode for improved environmental awareness

Premium quality and comfort: The M4's lightweight design features a padded headband and thick, soft ear pads to ensure users can wear it comfortably for long periods of time.

Super long battery life: The battery life can be up to 60 hours. With fast charging, you can get an extra 6 hours of battery life in just 10 minutes

Sennheiser offers a two-year warranty on its products from the date of purchase, and customers are required to provide valid proof of purchase in exchange for warranty service.

Century Communications Distribution (Hong Kong) Co., Ltd. (Sennheiser After-Sales Service Center-Hong Kong)

Address: Room G, 5/F, World Star Centre, 95 How Ming Street, Kwun Tong, Kowloon

Tel: 2392 9932

Whatsapp: 4611 3771 (Whatsapp only)

Email: sennheiser.cs@worldtech.com.hk

Business hours: Monday to Friday 9:45 - 18:15 pm (lunch break 12:30 - 13:30)

**Professional product after-sales service

For repair of professional-grade headphones*/AMBEO SOUNDBAR/HE 1, please contact Sennheiser Hong Kong Limited (appointment required).

*Professional headphone models: IE 40/100/400/500 PRO, HD 25/26/280/380 PRO

Tel: 5803 1620

Whatsapp: 9865 7085 (Whatsapp only)

Email: hk-cs@sennheiser.com

Inquiry form: https://zh-hk.sennheiser.com/service-support-contact