1MORE SonoFlow HC905 Active Noise Cancelling Headphones, Bluetooth Headphones with LDAC for Hi-Res Wireless Audio, 70H Playtime, Clear Calls, Preset EQ Via App - Silver: Product DescriptionClick to play videoPrevious pageStunning Sound Beyond ExpectationProvide an ultra-wide frequency response up to 40kHz, allowing you to enjoy high resolution music.Next page40mm Dynamic Driver 70-Hour Playtime QuietMax Technology 5 ENC Mics Tuned