Intensity is Monster's top-of-the line wireless in-ear headphone for working out. It's got all of Monster's patented sports technology that makes Monster the leader in sports headphones, with more models than any other manufacturer. Intensity wireless headphones feature unparalleled Pure Monster Sound, wirelessly, with 6+ hours of playback time for the most intense workouts. Rugged, durable construction mean Intensity stands up to your most grueling workouts, and a premium finish with reflective coating mean you can wear them at night safely. Moderate noise isolation gives you the best of both worlds: The focus you need to keep going, plus enough ambient noise to keep you safe.