TWS450 is Voiced to HIFIMAN Standards. The use of audiophile-grade dynamic drivers, combined with the unique tuning style of HlFlMAN, produces clear, three-dimensional sound that immerses the listener in a world of music, movies or games. Enjoy an unparalled listening experience! ENC Deep Noise Cancellation. Smart Filtering,Easier Communication. The artificial intelligence (Al) algorithm simulates the human auditory system, extracting the human voice and filtering out environmental noise. There is no need to shout when calling from a noisy environment. Low Latency Bluetooth 5.3. Instant connection after startup, remaining stable throughout the listening session. 20-hour Battery Life. 5hrs Uninterrupted Listening + 20hrs Total Battery Life Small Cavity. Comfortable and Easy to Carry. The earphone weighs only 3.5g. The cavity features a cable that is light and flexible. Ideal for extended listening in any environment. IPX4 Water Resistant. Sweat and precipitation are no match for the TWS450. Touch Operation: Touch the left/right earbud twice to pause the track/continue playing; Triple click the left earbud to rewind to the previous track; Triple click the right earbud to skip to the next track; Double click the left/right earbud to answer/end the call; Press and hold either earbud for 2 seconds to reject the call; Press and hold either earbud for 2 seconds to turn on the Voice Assistant. (Note: the device needs to support the Voice Assistant function) Batteries 1 Lithium Polymer batteries required. (included) Item Weight 1.41 ounces Manufacturer HIFIMAN Item model number TWS450 Package Dimensions 4.21 x 4.13 x 2.13 inches