Wireless, Bluetooth Technology, Connect up to 2 devices at the same time, 3.49 ounces Weight, Up to 35hrs Talk-time, 100ft Wireless Range, 02 Years Limited Warranty. Whether you're working in the office or on the go, background noise can really disrupt your flow. Put on your Evolve2 65 and feel the noise around you instantly fade, as the isolating foam oval ear cushions and pioneering new angled earcup design work to effectively block out your surroundings,