Sennheiser CX 400BT True Wireless Earbuds - Bluetooth In-Ear Headphones for Music and Calls - with Passive Noise Cancellation and Customisable Touch Controls, Black

Highest priority for excellent sound: Experience great sound quality with the dynamic 7 mm driver and extensive Bluetooth audio codec support Long battery life and comfortable to wear: listen to up to 20 hours of music on a single charge - ergonomic design with four sizes of ear adapters for optimal comfort and fit Digital control via app: Our smart control app for iOS/Android allows you to customize all the functions of these wireless headphones to your personal needs. Frequency response (microphone): 100Hz to 10kHz International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.