Concerning this item A brand-new, authentic domestic product that is certified by the Technical Standards Compliance Mark. Range of Frequencies: 2.4 GHz to 2.4835 GHz You can select between the "open type" light and the "air-tight type" with high sound isolation thanks to this two-way specification. takes the form of a mechanical skeleton and is as transparent as water. JBL's proud sound technology app allows you to customize your mood. Ambient Put on and Talk Through Fast charging and up to 32 hours of playback are supported. This lightweight, open-type model with two different ear tip replacement options lets you listen to music while taking in the light, and the JBL has great sound isolation that lets you focus on your music.