Description: HIGH PERFORMANCE - Hear ultra clear sounds its that simple. Amplifies sound in the best speech frequencies of the human voice complete background noise reduction and cancellation. Energy efficient rechargeable batteries allows for longer use between charges. LATEST DIGITAL TECHNOLOGY - Designed by audiologists. Using band digital sound processing, our affordable devices help amplify speech while actively reducing background noise making this the best most efficient audiology design yet. No prescription or medical evaluation required. .