Britzgo Digital Hearing Amplifier &ndash; Battery Saving Hearing Device Aid Your Life &ndash; Energy-efficient, Personal Amplifier & Digitally Controlled. SMALL, LIGHT WEIGHT AND DIGITAL NOISE CANCELLING TECHNOLOGY 1 YEAR WARRANTY!! - 90 DAY MONEY BACK!! Personal sound Hearing amplifier is built with a digital chip and frequency control to aid in different sound environments. Small behind the ear sound amplifier is designed to be practically Invisible and very light weight. Hearing amplifiers w/ digital chip technology help automatically suppresses noise distortion. Wear this digital hearing amplifier in either ear with provided replacement tubes.