16GB &Up to 50 hours continuous recording: Built-in 16G high-speed flash memory, which could save 1200 hours recording files or 3000 songs at most. With a graphic user guide and efficient after-sales team(support with video tutorial), You will master this machine in the shortest time. With a six-digit password lock setting, 1000,000 combinations to avoid being cracked. After three failed attempts, the recorder is locked and turned off, like a smartphone. No one can open your recording file to steal your 1536Kbps PCM recording Strong stereo reduction&High sensitivity microphone Dynamic noise cancellation chip Powerful main recording chip Recording a crystal clear audio. Great gift choice with powerful functions. Great gift selection with the power-on password to keep your device safe. 3 failed attempts, the recorder is locked and turned off, like a smartphone No one can open your recording file to steal your private information. The To Bom R39 is the most user-friendly voice recording machine from to Bom.