Description: Compatible Devices: Personal Computer Brand: OM SYSTEM Hardware Interface: Micro USB Type B Microphone Form Factor; Built-In Format: Digital Headphones Jack: 2.5 millimeters Number of Batteries: 2 AAA batteries required. (included) Memory Storage Capacity: 4 GB Item Weight: 0.25 Pounds Digital Recording Time : 7 hours Color: Black Details: Mono Mode 4GB, stores up to 2080 hours of audio 60 hours battery life WMA file format USB - PC/Mac Bundle and save! Offers welcome! Quick Shipping! IG handle: shopschueler007