After trying over 8 speaker and headset bluetooth systems, I'm now settled on the Spracht Aura system for my Porsche Convertible, which is very noisy when the top is down, specially at high speeds.I was impressed with the sound quality and the speaker volume. Everyone I talked to was able to clearly hear me beyond the wind noise. The microphone accessory even makes this better, but is not really necessary.In addition, the ability to use this while conferencing from the iPhone was impressive. My colleagues don't have to be near the microphone and can be heard clearly sitting as far as 8 feet away.This product gets my highest recommendations.