Type:In-Ear Headphones Drivers/Features:6.0 mm speaker, Four-microphone technology, Active noise cancellation, IP55-rated Frequency response:20 Hz to 20 kHz (music playback), 100 Hz to 8 kHz (calls) Connectivity:Bluetooth® 5.0, Up to 8 devices, 2 devices can be connected at a time Battery:Music and talk-time up to 7.5 hours with earbuds and up to 28 hours including charging case