Brand Name: MiTwoo Playback Formats: MP3 Playback Formats: WAV Playback Formats: WMA Record Audio Format: WAV Origin: Mainland China High-concerned chemical: None External Memory: Yes With Speakers: Yes Balanced Out: Yes Model Number: ZD70 Package: Yes External Microphone: No Certification: CE Dimensions (WxHxD): 105*34.8*12.5mm Voice Activated Recording: Yes With Speakers: Yes Record Audio Format: WAV continuously Recording time: 50hour