@Alex Rogers I'm using a nanfu battery, it's ok

@Alex Rogers yes , it can be uesed in the warmth, and I use this lithium-ion batteries, the instruction says it could work in - 20 ℃

Hi Alex, Thanks for your help, i have installed the latest firmware. But i find another problem when i put it in the field, it didn't work after several hours. Neither light was on, no matter how I adjusted it, it didn't work. However, when I put him in the room, half an hour later, he was back to normal again. Is it because the temperature is too low(3℃) that he can't work?

hi, i have a question should i reformat the sd card before i use the device again?

@Alex Rogers OK,thanks

@Alex Rogers Hi Alex, I have got my data, but I find that some of the audio couldnot be played. The pop-up window shows that it could be because the file type is not supported, the file extension is incorrect, or the file is corrupted. And i donot know how to convert audio to the following spectral form? Do I need to program in C or R?

@Alex Rogers Yes , I just bought this device, so I am not familiar with its operation. And I donot know how to import the data from the device into the computer .

@Alex Rogers Hi Alex, is the result correct? and what should i do next? and what is the meaning of "everying is reading to go"

@Alex Rogers Hi Alex. Thanks for your help ,the driver has been installed., but I have another problem,when I reach step6. it fails to open the file. Is there something wrong with the file I downloaded?

The following are the necessary files I downloaded and operational process I donot know what went wrong.

I tried the two methods you mentioned, downloaded the signed version and selected the "Disable Driver Signature Enforcement" option. but they still didn't work . Installation errors: The INF file you selected does not support this installation method.

Yes, I can download the .INF file, but the question is when I installed the file there's always a pop-up box. Installation error: The third party INF does not contain digital signature information.