JBL Pure Bass sound JBL Wave Flex 2 earbuds feature 12mm dynamic drivers that deliver exciting JBL Pure Bass sound. Smart Ambient technology JBL Wave Flex 2 earbuds come with Smart Ambient technology. Ambient Aware adjusts how much of the outside world you want to hear, while TalkThru lets you talk with others—all without taking your earbuds out. 4 mics for crisp, clear calls Two mics on each earbud pick up and clearly transmit your voice while canceling out ambient noise. So you can make clear, crisp calls even when you're walking through a busy park on a breezy day. Water-Resistant Design With an IPX4 water resistance rating, the JBL Wave Flex 2 earbuds are protected from sweat and splashes, making them ideal for use during workouts or outdoor activities. Seamless Multi-Point Connection Switch effortlessly between devices with Multi-Point Connectivity. Whether you’re moving from your phone to your laptop, the earbuds will automatically adjust for a smooth, hassle-free transition.