Thanks to Sennheiser's dynamic 7-mm converters – the same drivers are also used in the Momentum True Wireless 2 – the CX 400BT True Wireless is supposed to deliver an outstanding sound at its price point. With the Sennheiser Smart Control App it is possible to adjust the sound experience via the equalizer. The CX 400BT True Wireless supports the codecs SBC, AAC and aptX.
The touch interface of the earphones is intuitive and can be individually adjusted. This allows the user to control audio, calls or voice assistants such as Google Assistant or Apple Siri according to his preferences. During telephone conversations and when using voice assistants, ambient noise is filtered out by microphones, so that conversations sound natural and crystal clear. Bluetooth 5.1 compatibility is intended to ensure reliable connections with mobile devices.
With its battery life of 7 hours, which can be extended to up to 20 hours with the included charging case, the CX 400BT True Wireless is designed to deliver all-day entertainment, while also offering the necessary comfort.
For a perfect fit in the ear, which holds the headphones securely in place and effectively dampens external noise, adapters are available in four different sizes. In Germany, the CX 400BT True Wireless is now available for around 200 Euros in black and white.