With two levels, level 1 blocks any low frequencies and level 2 just kills your overall surrounding noise. Se bien que Audio Technica ya sacó un micrófono especial para estos audífonos, suele ser caro ($1,500- $2,000) pero si tan solo le cambiaran la entrada a un 3. the pain from the footbed nubs anyway. _______1) So, this is acceptably one of the lightest wireless out there. Customer service for return was great and was reimbursed for the item but still paid for the $8. These shoes are well-cushioned and durable. They also sound great. The system itself is simple, but clearance was a major problem. Its every bit as good as the original and more! And they dont register on an LG K9 but they do on a K20.