Audio quality is our top priority: Experience great sound with a 7 millimeter dynamic driver and a wide range of Bluetooth codec support
Long battery life (20 hours) and comfortable wearing: Get up to 20 hours of music playtime with one charge - The ergonomic design offers optimal comfort and secure fit with 4 ear adapter sizes
Personalize to your everday needs: Fully adaptable controls for music, calls and voice assistant - Built-in audio equalizer adapts the sound to your personal preferences
Full digital control with our app: Our Smart Control app for iOS / Android allows all of the earphone functionalities to be modified to your personal choice
Enjoy outstanding sound quality no matter your mobile device or your surroundings with our wide range of audio codec support including AAC, aptX, SBC and passive Noise Cancelling
Sennheiser uses decades of expertise to drive the world of audio technology forward with every product - for new, unique sound experiences
Included components: CX 400BT True Wireless, Charging case, USB-C charging cable, Silicone ear adapter sets (in size XS/S/M/L)
Long battery life (20 hours) and comfortable wearing: Get up to 20 hours of music playtime with one charge - The ergonomic design offers optimal comfort and secure fit with 4 ear adapter sizes
Personalize to your everday needs: Fully adaptable controls for music, calls and voice assistant - Built-in audio equalizer adapts the sound to your personal preferences
Full digital control with our app: Our Smart Control app for iOS / Android allows all of the earphone functionalities to be modified to your personal choice
Enjoy outstanding sound quality no matter your mobile device or your surroundings with our wide range of audio codec support including AAC, aptX, SBC and passive Noise Cancelling
Sennheiser uses decades of expertise to drive the world of audio technology forward with every product - for new, unique sound experiences
Included components: CX 400BT True Wireless, Charging case, USB-C charging cable, Silicone ear adapter sets (in size XS/S/M/L)
Specs
Connection Type Wireless
Wireless Connectivity Bluetooth
True Wireless Yes
Maximum Wireless Range 33 feet
Built-In Microphone Yes
Carrying Case Yes
Battery Life 7 hours
Battery Charge Time 1.5 hours
Ear Tip Sizes Included Extra small, Small, Medium, Larg
Audio
Sound Isolating Yes
Environmental Noise Control No
Minimum Frequency Response 5 hertz
Maximum Frequency Response 21 kilohertz
Driver Size 7 millimeters
Connectivity
Connection Type Wireless
Wireless Connectivity Bluetooth
True Wireless Yes
Maximum Wireless Range 33 feet
Power
Rechargeable Yes
Battery Life 7 hours
Battery Charge Time 1.5 hours
Charging Accessory Included Case, Cable
Battery Life Provided by Charging Case 13 hours
Charging Interface(s) USB Type C
On/Off Switch Automatic