Features: Digital voice recorder and music player with sound. One-touch recording, high efficiency for class, interviews, meetings, lectures, etc. High grade built-in microphone, allows you to record detailed conversations. Built-in rechargeable lithium battery, offers up to 20hrs continuous recording (fully ). Supports 8GB or 16GB or 32GB memory card (not included). Small body, easy to carry and hide. : Recording Format: WAV Music Format: WAV Playback Formats: WAV, MP3 Power Supply: Li-ion battery Recording Time: 20 hours (fully ) USB Port: USB 2.0 Frequency Response: 20Hz-20KHz Working Temperature: 0-40 With Speakers: Yes Balanced Out: Yes Capacity: No capacity (supports 8GB or 16GB or 32GB TF Card) Compatible System: Windows XP, Window Vista, Windows 7, Windows 8 Material: plastic colour: black Package Contents: 1 x Voice Recorder 1 x Earphone 1 x Charging Cable 1 x English Manual (English) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.