Utilize this accessory when you're using SIE2 or SIE2i sport headsets without the armband. The optimal length-21 inches-makes it ideal for use when you're working out on a treadmill, or while you're linked to a tablet or laptop.
21-inch extension cable for enhanced convenience
Compatible with Bose® SIE2 and SIE2i sport headphones
Available in Green, Orange, Blue or Purple