Easy to use: Turn on the recording mode, just turn the switch to ON with your finger, simple operation Remote recording: Built-in high-sensitivity recording chip, 80 meters long-distance high-definition recording, dynamic noise reduction, high-definition recording source Intelligent voice-activated recording: Sound: more than 30 decibels will be recorded, silent: or less than 30 decibels will not record Connect to the phone to play: Connect to the OTG adapter(not included) to play and manage files on your phone Writing while recording: Applicable to students, classroom learning, business conversations. conference academic exchanges, exchange of ideas, etc. Specifications: Product Type: Voice recorder pen Recording method: Start recording, save off Battery: Environmentally Friendly Polymer Lithium Battery Charging time: About 1 hour Recording format: WAV Play format: MP3/WMA/WAV Built-in capacity: 8GB Sampling Rate: 48KHZ Recording bit rate: 192/256KBPS