TreO By iHEAR 3 In 1 Hearing Amplifier Left Ear Personal Sound Amplification. The box has been opened, but is unused. It is missing the “sport lock”, but that is available at the iHear website for $6 if you think you might need it. Priced accordingly.Included in box: 1 Left Ear TreO 3-in-1 Hearing AmplifierAssorted Ear Tips To Fit Most6 I hear batteriesCarry CaseCleaning wipes (2X)User Guide & Easy Setup guide3-in-1 Hearing AmplifierAmplifies sound selectively into your ear, Hear sounds clearlyClarifies speech, Listening to soft sounds that would be difficult for normal hearing individuals to hear (e.g. distant conversations)Suppresses background noise, Accentuate sounds in specific listening environmentsCompact design for discreet wear behind the earAdvanced 100% digital technologyHear crisp, natural sound, Accentuates natural sound in specific environments.Compact design for virtually invisible wearAutomatic feedback cancellationVolume Control, Preset with 4 unique sound profiles