Listen up Personal Sound Amplifier The Listen Up Personal Sound Amplifier (PSAP) is a Base Model Hearing Amplifier to Help you hear in any envnironement Amplifies ambient noise with the equipped volume adjustment wheel - allowing you to set the device to a comfortable listening volume Includes the Listen Up Amplifier, Earbuds, and 1 AAA Battery (operates on 1 AAA Battery) Device is small and compact, measuring only 3" x 2" (inches) and has a pocket/belt clip located on the back Recommended for Mild/Moderate Hearing Loss - If you have more severe hearing loss, we recommend trying the Williams Sound Pocketalker Ultra (Search ASIN B00Q72Z5PU)