USB Digital Voice Recorder Posted on January 3, 2017 Olympus model VP-10. 4GB internal memory. PCM/WMA/MP3 recording options. AAA Ni-MH rechargeable battery via USB connection. 50 hour approximate battery life. 66 hour approximate MP3 recording time. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.