Excerpt: When Julie announced the Sound ID 400 I couldn’t wait for it to be announced. Small, simple and packed with features like PersonalSound (enhanced listening power) and Automatic Volume Control (self-explanatory) in a nice looking package.
Pros: Excellent sound quality to the wearer., Excellent bluetooth power/range., Comfortable and extremely secure in the ear.
Cons: ~75% of the time there's a very loud burst of static right when the call connects., Environmental mode and PersonalSound are not useful features., Main button is in a bad location., Single volume button should be replaced with up/down buttons and relocated., No Voice Command ability., Cannot reje...
Conclusion: When I reviewed the Sound ID 300 I was hoping it would be a “Jawbone killer”. Well Sound ID went and tweaked the problem areas and added some additional features to create one of the best Bluetooth headsets on the market. The sound issues that I found in the Sound ID 400’s predecessor are now gone.
Pros: Superb sound quality (incoming and outgoing), Excellent Battery Life, Dual phone connection capability, Comfortable to wear even for long intervals