Noise cancellation, powered by HD Noise Cancelling Processor QN1 Sound quality - these Bluetooth headphones support ideal Resolution Audio, and even compressed music files are upscaled using evolved DSEE Extreme technology Speak-to-Chat automatically pauses playback when one start a conversation, Wearing Detection powers off headphones when not wearing them, plus more smart features for a seamless, hands-free listening experience With multipoint connection, Sony headphones can be paired with two Bluetooth devices at the same time, Bluetooth version: 5.0 and frequency range: 2.4GHz band (2.4000GHz-2.4835GHz), Effective Range : Line of sight approx.30ft (10m) Driver Unit : 40mm dome type (CCAW Voice