Olympus Digital Voice Recorder DM-720. Audio formats: MP3 PCM. Battery life: 52h recording 35h play. Battery size supported: AAA. Bluetooth: no. Built-in memory: 4 GB. Connection for headphone: yes. Features: Auto Recording Playback Control File Selection Repeat Functions Automatic Playback File Operation Sound Enhancement Data Organisation Voice Guidance. Included in delivery: 1 x Digital Voice Recorder. Memory card compatibility: microSD card. Microphone port: yes. Number of batteries supported: 1. Operating frequency: 20 – 21 000Hz. Power supply type: 1 x AAA battery. Rechargeable: no. Recording media: flash memory. Speech recognition: yes. Type of display: Full Dot Matrix display. USB: yes. Weight: 72 g. Dimensions: 39.6 x 14.4 x 105.9 mm (W x D x H). Colour: silver.