This recorder upgraded its higher sensitive microphones, which means that you can enjoy premium quality sound The simple one-key recording makes it super user-friendly Support PMC voice decoding, which ensures saving the HD original sound data without loss The built-in voice-activated sensor will ensure to capture any words in the best-quality audio, so you won’t miss any important information A built-in DSP noise reduction chip, can filter noise for different environments to provide high fidelity and clarity of the recording and playback After a fully charged, it can record 500 hours continuously or on standby for 365 days Not only can make a record, but also support multiple playback formats like MP3\WMA\APE\FLA\0GG\AAC\AAX\M4A With a built-in time chip, it is with a timestamp function that allows to sync of time data and saves the voice files named in time With an OTG adapter (not included), you can directly manage your voice files on Android devices A strong magnet is set inside to offer a more convenient record like absorbing onto the blackboard when you are in the class Specifications: Recording format: WAV/MP3 Playback format: MP3\WMA\APE\FLA\0GG\AAC\AAX\M4A Recording method: one-key recording Battery: environmentally friendly polymer lithium battery Battery capacity: 3200mAh Bit rate: 32Kbit-1536Kbit Recording time: about 500 hours Standby time: about 365 days Charging time: 6 hours Built-in memory: 8GB Product specification: 72mm*27mm*22.94mm