The Jawbone ERA is the only Bluetooth headset equipped with military-grade NoiseAssassin 3.0, the latest version of Jawbone's industry-first noise and wind canceling technology. Originally developed for use by tank commanders and helicopter pilots, NoiseAssassin 3.0 eliminates background noise better than any other headset. It also auto-adjusts inbound call volume and intelligibility to your environment. Whether you're at a noisy ball game or on the road, you'll always hear and be heard.