Logitech Headset...

Frequency Response Range: 20-20000 HzActive Noise-Cancellation: YesBuilt-in Microphone: YesBattery Capacity: 55 mAh

BT 5.1 technology ensures higher data transfer speed, more stable and fast connection, and lower power consumptionTrue wireless dual-ear design, left and right earphone channels are separated. It can be used solely or in pairsAuto power on and fast pairing between left and right earbuds once opening the charging case lidTouch control design, no more pressure on your ears. Easy to control music and calls, and activate voice assistantBuilt-in Mic on both earbuds with noise reduction enables hands-free call and delivers clearer talking sound in stereo mode

BT 5.1 chip ensures stable and fast connection, low power consumption and low latency.Adopt 13mm dual-frequency moving coil unit, high frequency analysis, restore sound details without distortion.After the first pairing, just take the earbuds out of the charging case, the earbuds will automatically connect with your mobile phone.Semi-in-ear design, fit the ear canal, bringing comfortable wearing experience.Built-in microphone, AAC/SBC audio decoding, clear sound quality.