<b>How to turn off the pen : </b><br><br> Just long press the power on button for 2-4 seconds, then the red and blue indicator light will flashing 4 times ,then The device turn off . <br><br> <b>Applicable operating system </b><br><br> XP/Vista<br> Win7/Win8/win10<br> Mac OS X<br> <b>Package Includes</b><br><br> 1*Digital Voice Recorder Pen<br> 1*16GB Micro SD Card<br> 3*Refills<br> 1*USB Cable<br> 1*User Manual<br>