HUAWEI FreeBuds 4 are true wireless stereo (TWS) semi-in-ear earphones and come with a charging case. They feature active noise cancellation (ANC), which can be activated when making voice calls or playing music. The advanced acoustic design combines a 14.3 mm LCP dynamic driver and dual-microphone hybrid ANC, and brings crystal clear sound during voice calls via triple-microphone noise cancellation. Little power is consumed by the earphones, and the charging case allows you to make the most of their long battery life. Wired charging: A full charge of both the charging case and earphones takes around 1.5 hours. A full charge of the charging case takes around 1 hour. Decide the sounds you record with HUAWEI FreeBuds 4 thanks to the dual-mode 48 kHz HD sound recording. Surroundings Mode lets you recreate whatever environment you're in, picking up the sounds around you in brilliant detail. Voices Mode uses voice frequency recognition technology to hone in onto the specific frequencies of your voice, blocking out extraneous background noises in the process. Utilising the multi-device interactive power of HarmonyOS, you can transfer video from your phone to a Huawei Vision, laptop or tablet, and the audio to HUAWEI FreeBuds 4 (Only available on HarmonyOS 2.0 MR). Ensure that late night movies on the big screen are for your ears only. Package include: Earphones x 1 pair (left and right earphones) Charging Case x 1 Quick Start Guide, Safety Information, and Warranty Card x 1 set Warranty Certificate x 1 USB-C cable x 1 The closer the fit of the earbuds, the greater the noise cancellation effect. Smaller ear cavities allow the earbuds to achieve a greater noise cancellation effect than larger ear cavities. It is recommended to maintain a close fit when wearing the earbuds to maximize the noise cancellation effect. Data from Huawei labs. You can customise swipe controls in the Huawei AI Life App. Actual functioning is subject to the interface display. For both Surroundings Mode and Voices Mode. Involves recording through the earphones, and needs to be manually initiated via the AI Life App. Only supported on certain Huawei smartphone models: HUAWEI Mate 40, HUAWEI P40, HUAWEI P40 Pro, etc., which have been updated to EMUI 11 (or above). Only works with phone apps for photography, audio recording, short-video recording, or apps with a live streaming feature.