Thank you for viewing. I will pack it carefully and ship it quickly. Thank you for your cooperation. Product certified with the Technical Regulations Compliance Mark. Frequency band: 2.4 GHz – 2.4835 GHz 2-way specification: choose between "open-type" for a light fit and "sealed-type" for high sound insulation Features a mechanical skeleton design that catches the eye with its high transparency, like water Personalize JBL's renowned sound technology to match your mood with the app Ambient Aware & TalkThru function equipped Supports up to 32 hours of long playback and fast charging These are 2-way fully wireless earphones that allow you to choose between "open-type," which hooks onto the entrance of your ear by changing the ear tips, and "sealed-type," which inserts the earphone body deep into your ear, according to your preference. Noise canceling compatible