HUAWEI FreeBuds 4 ANC earbuds with semi-open design, Bluetooth 5.2, fast charging announced HUAWEI today introduced FreeBuds 4 , the company’s latest true wireless earbuds with Bluetooth 5.2 chipset that reduces latency to 90ms. It has a Semi-open design compared to in-ear design in the FreeBuds Pro and FreeBuds 4i, but it still has adaptive noise reduction technology that moderately reduces external low-frequency noise, making your hearing more comfortable during noise reduction. It can achieve up to 25dB of hybrid active noise reduction. It has Kirin A1 chip, 3-microphones for call noise reduction, touch controls and built-in 14.3mm dynamic drivers with an independent bass enhancement engine and AI sound effects. There are touch controls, and the headset weighs just 4.1 gram. It can connect to two devices at the same time and can achieve high-definition vocal recording at a sampling rate of 48kHz. It promises up to 4 hours of standalone playback and 22 hours of total playback. 15 minutes of charging offers 2.5 hours of listening. It also supports wireless charging.