Sound World Solutions's CS50 is the company's second model in its Bluetooth series of personal sound amplifiers. It features an Apple iOS 7-compatible customizer app, enabling users to adjust sound enhance from an iPhone.

The CS50 is designed for users who need occasional help hearing, but who don't want a hearing aid. Also functioning as a Bluetooth headset for mobile phones, it can operate up to 15 hours on its rechargeable battery. In addition, it can stream a variety of audio sources including music, audio books, and podcasts.

The CS50 features improved directionality for listening assistance in noisy environments, such as restaurants. Directionality is the only way to improve intelligibility in noisy environments.

Out of the box, users can adjust volume and access settings designed for specific environments. They can also toggle between three preset amplification profiles. The device allows even greater personalization using a free app for iOS 7, Android, Mac OS X or Windows. The app walks users through a short personalization program to create a customized sound profile. The app also has an equalizer that allows users to adjust treble, mid-range and bass frequencies to further personalize their sound.

The CS50 costs US$349.99. It's available in left ear or right ear versions at http://bit.ly/1h78xGt in right- or left-ear versions for $349.99. Each kit contains two rechargeable batteries, a charging station, carrying case and a variety of ear tips for customizable fit.