This 72Gb Digital Voice Activated Recorder Is A Portable Tape Recorder That Can More Convenient with 2*AAA Batteries: Unlike most recording devices on the market, L77 is powered by 2*AAA batteries. When batteries are exhausted, you can start recording immediately after replacing the batteries. Effectively save charging time. The recording device displays the remaining battery on the top right corner, so there is no need to worry about unexpected power cuts. Replace batteries anywhere and anytime. Rechargeable AAA batteries also can be used 72GB Large Capacity: Upgraded voice recorder supports 72GB capacity (8GB built-in memory and removable 64GB TF card expansion) for meeting more recording needs. According to your own needs, replace the TF card with a different capacity. Package only comes with a 64GB TF Card 1536kbps Premium Quality Sound: Our 72GB audio recorder adopts newest high-sensitivity omnidirectional microphone and DSP dynamic noise cancellation recording chip. Capture 1536kbps crystal clear audio Simple Tape Recorder with Password Protection: All buttons are on the front of the machine and the operation logic is like smart phone. You can easily learn to use it in a few seconds. This audio recording device can enable 4-digit password protection. Keep your audio files secure always Easy Files Management: Connect this tape recorder to a computer via the supplied type-c cable for transferring, labeling recording files. Meanwhile, you can transfer music or recordings from computer to the smart audio recorder