... 88 Newest ,Audiphone ,Cheap Hearing aid ,Voice Amplifier ( in the ear hearing aid )Detail Product Description1. ... inside ,low current and powr saving .-The voice being able to be amplifiered ,the hearing ... great power ,easy operation.-Lound and clear voice-Include batteries and extra tips-CE Approved ... Whether the switch is openIf the battery in the correct installation positionWhether there have ...