Features: Digital voice recorder and music player with high quality 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 20 hours continuous recording (fully charged). Supports 8GB/16GB/32GB memory card (not included). Small body, easy to carry and hide. Specifications: Recording Format: WAV Music Format: WAV Playback Formats: WAV, MP3 Power Supply: Li-ion battery Recording Time: 20 hours (fully charged) USB Port: USB 2.0 Frequency Response: 20Hz-20KHz Working Temperature: 0~40°C With Speakers: Yes Balanced Out: Yes Capacity: No internal capacity (supports 8GB/16GB/32GB TF card) Compatible System: Windows XP, Windows Vista, Windows 7, Windows 8 Material: Plastic Color: Black Package Contents: 1 x Voice Recorder 1 x Earphone 1 x Charging Cable 1 x English Manual Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3 cm.