1、Built‑in encryption function, as long as the user sets a password, the recording will be automatically encrypted to ensure the security of the recording data.<br> 2、Built‑in strong magnet, worry‑free and installation‑free, can be directly adsorbed on the metal surface and fit tightly.<br> 3、When the system detects that the battery is low, the recorder will automatically save the file in advance and then automatically shut down to ensure that the recording data is not lost.<br> 4、Through the OTG adapter, you can directly connect for Android system mobile phone, free of computer constraints, and directly organize important files on your mobile phone.<br> 5、Built‑in about 3000mAh polymer physical safety lithium battery, strong endurance, long‑lasting power.<br> 1 x Voice Recorder1 x Earphone1 x Conversion Head1 x Data Cable1 x Manual<br> Item Type: Voice RecorderMaterial: ABSModel: Q77Recording Format: WAVPlay Format: MP3/WAV/WMAInterface: USB<br> 2.0Sampling Rate: 48KHzRecording Bit Rate: 192K bpsBattery Type: Lithium BatteryBattery Capacity: 3000mAh (Built-in)