This past year, Sennheiser released its most portable pair of wireless in-ear headphones, the HD 1 Free. Now, Sennheiser has released yet another portable pair with pretty much the same look, but for $100 less expensive.

Sennheiser has succeeded with the CX 6.00 BT in delivering big results in a compact package. The in-ears sonic enhancements are certainly impressive, providing powerful sound that's incredibly rich and detailed.