Plugfones Liberate 2.0: Earplugs with Audio. The Liberate 2.0 features interchangeable safety-rated earplug tips with SoundSeal Noise-Suppressing Technology, which acts as a barrier between you and everything you don't want to hear. With a 12-hour battery, fast charge technology and Bluetooth 4.1 you get the crystal-clear audio you want + the protection you need without all the tangles. The built-in Isotalk Noise Isolating Mic and Quickdraw Easy Access Control make it simple to take calls and control your audio as you work.