noise-canceling headphones are equipped with Advanced ANC technology, featuring noise detection microphones and optimized algorithms that help reduce environmental noise. The built-in HD microphone is perfect for voice meetings, video calls, or voice input, helps keep your voice clear even when ventilating by an open window or walking on the street.headphones support both Bluetooth and 3.5mm wired connections, easily compatible with smartphones, tablets, laptops, and other mainstream devices. Equipped with Bluetooth 5.3 technology, they offer fast pairing and reliable interference protection. They can be paired with multiple devices and allow quick switching between them (simultaneous connection to multiple devices is not supported), making them perfect for use at home, office, or workouts.. Note: This item is an Amazon/Walmart customer remorse return. It has been inspected and may or may not have been repackaged.