Features: 1.1440hours persistent standby. 2.Active Noise Cancellation and Clear Sound Technology. 3.Built-in HD microphone 4. Small size, easy to carry 5.Strong magnetic adsorption, better concealment 6.Silent and no light recording, better security 7. Expand TF Card: Support Adding 8-128GB TF Card(Not included) 8. Professional 8-core chip, better noise reduction effect. You can hear it, you can record it 9.One key to record, one key to save. Timestamp, for forensics 10.Recording while charging Specification: Product Name:Professional digital voice recorder Dimension: 78.5x39.7x18.4mm Net Weight: 93g Battery: 3.7V 1600mA internal lithium battery Recording Format: WAV Playing Format: WAV/WMA/MP3 etc Digit: 192kbps Earphone Playing Time: about 175hours Charger Requirement: 5V 300mA-500mA Recording Time: 16GB about 188hours Application: for study,for conference,for business,for interview,for judicial forensics etc... (The product appearance and printed words may vary depending on the batch, but this does not affect use) Color: As Shown Material: ABS Package Contents: 1 x Mini Voice Recorder