Brand Name: ALiandream Playback Formats: MP3 Playback Formats: WAV Playback Formats: WMA Record Audio Format: WAV Origin: Mainland China High-concerned chemical: None External Memory: No With Speakers: No Balanced Out: Yes Model Number: 8gb/16gb/32gb Mini digtal voice recorder oculta Package: Yes External Microphone: Yes Certification: CE Certification: FCC Dimensions (WxHxD): 39*31*6mm Voice Activated Recording: Yes Product weight: 10gram Feature: Small size ,easy to carry