Product Description

Sennheiser Sound Quality. Everyday Convenience.

Experience the legendary audio craftsmanship of Sennheiser in a lightweight, travel-friendly design. The HD 400S over-ear headphones deliver rich, balanced sound with dynamic bass—perfect for music, podcasts, movies, and calls. Featuring a convenient one-button remote with microphone and a foldable design that fits easily into any bag, these headphones are the ideal companion for your daily audio needs, whether at home, in the office, or on the go.

Why Choose the HD 400S?

• �� Signature Sennheiser Sound: Powered by high-performance dynamic drivers, the HD 400S delivers a well-extended frequency response (18Hz–20kHz) with expressive, dynamic bass and clear, natural mids and highs.Whether you're listening to your favorite playlist, editing a podcast, or immersing yourself in a game, every detail comes through with exceptional clarity.

• ��️ One-Button Smart Remote & Mic: Take full control of your audio experience without reaching for your device. The inline remote features a single button that lets you:

  • Play/Pause music and videos

  • Skip tracks (double-tap)

  • Answer/End calls with crystal-clear voice transmission

  • Activate voice assistants (Siri, Google Assistant) with a long press.
    The omnidirectional MEMS microphone ensures your voice is heard clearly during calls, online meetings, or gaming sessions.

• �� Focus on What Matters: The closed-back, around-ear design naturally reduces ambient noise, allowing you to immerse yourself in your audio without distractions.Perfect for busy offices, commuting, or studying at home.

• �� Comfort for Extended Listening: The HD 400S features soft, padded earcups with an ergonomic oval shape that fits comfortably around your ears—not on top of them.The lightweight construction (just 217g) and adjustable padded headband ensure fatigue-free wear, even during long listening sessions.

• �� Built for Life on the Go: When it's time to pack up, the HD 400S folds down into a compact size that easily slips into your bag. The included storage pouch keeps your headphones protected during travel.The detachable, single-sided cable with an angled 3.5mm plug reduces tangles and provides a comfortable connection when your device is in your pocket.

Specification:
Impedance: 18Ω
Frequency response (Microphone): 100–10,000 Hz(-10 dB)
Frequency response (Headphones): 18–20,000 Hz(-10 dB)
Sound pressure level (SPL): 120dB (1kHz/1Vrms)
THD, total harmonic distortion: <0.5% (1kHz/100dB)
Ear coupling: Over-Ear
Jack plug: 3.5mm angled
Cable length: 1.4m
Transducer principle: Dynamic
Weight: 217g
Pick-up pattern: Omni directional
Microphone sensitivity: 44dbV/Pa
Acoustics: Closed
Sensitivity: 120 dB SPL @ 1 kHz, 1V RMS
Package Size: Approx. 16*16*9cm
Package Weight: Approx. 550g


Package List:
1*HD 400S around-ear headphones
1*RCS 400 detachable single-sided cable with 1-button remote and 3.5 mm angled plug
1*User Manual(Multilingual)