This recorder has upgraded its more sensitive microphones, which means you can enjoy the highest quality audio. The simple one-button recording makes it super user-friendly. Supports PMC voice decoding, ensuring that HD original audio data is saved without loss. The built-in voice-activated sensor ensures that every word is captured in the best quality audio, so you don't miss any important information. A built-in DSP noise reduction chip can filter noise for different environments to provide high fidelity and clarity in recording and playback. After a full charge, it can record 500 hours continuously or standby for 365 days. Not only can it record, but it also supports multiple playback formats such as MP3WMAAPEFLA0GGAACAAXM4A. With a built-in time chip, it has a timestamp function that allows time data synchronization and saves the voice files named by time. With an OTG adapter (not included), you can directly manage your voice files on Android devices. A strong magnet is placed inside to offer more convenient recording, such as absorbing on the blackboard when in class. Specifications: Recording format: WAV/MP3 Playback format: MP3WMAAPEFLA0GGAACAAXM4A Recording method: one-button 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: 32GB Product specification: 72mm*27mm*22.94mm