Sennheiser HD 400-BT On-Ear Bluetooth Headphones (Black)

Experience studio-grade sound without the fuss: the Sennheiser HD 4.40 BT (HD 400-BT series) delivers rich bass, clear mids and detailed highs in a compact, travel-friendly on-ear design. Ideal for daily commutes, remote work and long listening sessions, these headphones solve tangled wires and weak battery life with reliable wireless streaming and up to 25 hours of playback. Soft ear cushions and a foldable build ensure all-day comfort and durability. Backed by a 2-year manufacturer warranty and ’s trusted customer support, you get authentic product assurance, reliable delivery and smooth after-sales service.

Top Features

• Premium Sennheiser sound signature — accurate, balanced audio for music and voice
• Up to 25 hours battery life — uninterrupted listening across long days
• Comfort-fit on-ear cushions — soft, breathable pads for extended wear
• Foldable, travel-ready design — slips easily into bags and commuting kits
• Stable wireless connectivity — smooth streaming and dependable range
• Lightweight yet robust build — durable materials for everyday use
• Integrated microphone for clear hands-free calls — stay connected on the move
• Fast charging capability — quick boost when you’re short on time
• Wired playback option — continue listening when battery runs low
• Easy controls on earcup — intuitive playback and call management

Technical Specifications

Why Buy From ?

• Guaranteed authentic Sennheiser products sourced from authorized channels.
• Secure, fast shipping and careful packaging to protect premium gear.
• Dedicated customer support to help with setup, warranty claims and returns.
• Transparent policies and easy returns — peace of mind with every purchase.
• Competitive pricing and regular offers while preserving manufacturer warranty.

Who Should Buy This?

• Daily commuters who need reliable wireless audio and comfort.
• Remote workers and students needing clear voice calls and extended battery life.
• Frequent travelers who want foldable, durable headphones for the go.
• Music lovers who prefer balanced, accurate sound without bulk.
• Anyone seeking a trusted brand with solid warranty and after-sales support.

Smart FAQs

Q: How long does the battery last on a single charge?

A: Typical playback time is up to 25 hours, depending on volume and usage. Charging takes around 1.5–2 hours.

Q: Can I use these headphones wired if the battery dies?

A: Yes. A 3.5 mm audio cable is included so you can continue listening in wired mode when battery is low or to save power.

Q: Do these headphones have active noise cancellation (ANC)?

A: No. These are closed-back on-ear headphones that provide passive noise isolation through snug ear pads rather than active noise cancellation.

Q: Are these compatible with my smartphone or laptop?

A: Yes. They pair with any Bluetooth-enabled smartphone, tablet or laptop and also support wired connection via the included 3.5 mm cable.

Q: What is covered under the warranty and how do I claim it?

A: The 2-year manufacturer warranty typically covers defects in materials and workmanship. Contact customer support or the manufacturer’s service center with your invoice and warranty card to initiate a claim.

Q: Are replacement ear pads available?

A: Yes. Replacement pads and accessories are available through Sennheiser authorized service channels and select retailers. can assist with sourcing genuine parts.