I have a very lightly used recording device. Here are its specifications:- Devices: USB, Secure Digital Card Microphone Form Factor: Built-in Format: WAV Headphone Jack: 3.5 millimeters Number of Batteries: 2 AA requires batteries. Memory Storage Capacity: 1 TB Screen Size: 2 inches Battery Life: 20 hours Digital Recording Time: 120 hours Microphone Operation Mode: Stereo