1 with 232 serial port monitoring and recording function;

2 When the card is not inserted, you can connect the computer through the usb data cable, and use tools such as serial port assistant to view the sent and received data. A: and B: are added in front of the two channel data respectively;

3 It can be powered by USB and lithium battery separately, or can be powered at the same time, and the usb can charge the lithium battery;

4 When the card is inserted, the data will be stored in the memory card;

5 With time stamp, time can be calibrated via usb.

6 The 3D printed shell needs to be purchased separately. The product itself does not contain the shell. Users who need it can provide the 3D model file and print it by themselves.