Sennheiser CX 400BT True Wireless Earbuds – White (Opened, Never Used)

Condition: Opened, Never Used — This item has been opened but has never been used. All original contents are included. It is in perfect working order and is sold at a reduced price to reflect the opened packaging.

The Sennheiser CX 400BT delivers audiophile-grade sound in a true wireless format. With customisable sound via the Smart Control app and a comfortable, secure fit, these earbuds are built for music lovers who refuse to compromise on quality.

Compatible With

• Any Bluetooth 5.0 device — smartphones, tablets, laptops (iOS & Android)
• Sennheiser Smart Control app (iOS & Android) for EQ customisation

Key Features

• 7mm dynamic drivers tuned by Sennheiser for rich, detailed sound
• Bluetooth 5.0 with aptX and AAC codec support
• Up to 7 hours playback per charge (20 hours total with charging case)
• Touch controls on each earbud
• Customisable EQ via Sennheiser Smart Control app
• IPX4 splash resistance

What's in the Box

• Sennheiser CX 400BT earbuds (White)
• Charging case
• USB-C charging cable
• 3 sizes of ear tips (S, M, L)
• Quick guide

📦 UK Delivery: Typically delivered in 3–5 working days to UK addresses.