OLY141540 - Olympus Pearlcorder J500 Voice-Activated Dual Tape Speed Microcassette Recorder Uses a standard microcassette tape. Batteries Required - 2 AAA (included). Includes voice activation for hands-free recording. Dual tape speeds give you up to 3 hours of recording time. Indexing capability helps you locate important recordings. 3 LED battery-check system. 1 x Microphone Sub-mini phone mono 2.5 mm, 1 x Headphones Sub-mini phone mono 2.5 mm, 1 x DC power input.