Plantronics MX505 Headset for Cordless or Mobile Phones with 2.5mm ConnectionNow that New Jersey drivers MUST use a hands-free cellphone device OR an earpiece like this, I searched hard and tried several. This is the best of the crop, super clear sound even with wind noise around the vehicle. It's easy to wear, fitting under the ear (vs over it) and the earpiece swivels for true-fit comfort in right or left ear. My callers tell me the mic delivers very clear sound as well. I am v. happy with this purchase and Amazon made buying it easy -- as always.