Pros: This is a genuine Rayban Wayfarer sunglasses of high quality though the lenses are a bit big and stick out from the face with no curve. I used a heat gun to carefully reshape the frame. Be sure to order the smaller lenses.

Cons: Shipping for this item was very slow clearing through customs in China.

Pros: This Bluetooth gets good reception and those being called have no complaints about the sound quality but this unit has one major problem.

Cons: Unlike the M155 that had a recessed answer button that made it very difficult to accidentally activate, the M55 has a button integrated into the top half of the outer wall that makes it extremely easy to push in, causing accidental dials and accidentally hanging up on calls. Do not get this unit or you will regret not paying attention to my advice.