Limited Edition Colors - Now available in Midnight Blue and Eclipse Gray with brushed bronze logos. The Bose QuietComfort Earbuds II's realistic and well-balanced sound is achieved via the use of breakthrough technology designed exclusively for small devices. When background noise is eliminated with the world's best noise cancellation, Quiet Mode is pure bliss. ActiveSenseTM technology in Aware Mode can either eliminate or decrease loud background noises. With up to six hours of battery life on a single charge and a charging case that carries three extra charges, you can keep going all day.