diff --git a/Echo_Device/ppts/3_Image_Acquisition_and_Mounting.pptx b/Echo_Device/ppts/3_Image_Acquisition_and_Mounting.pptx
index 26d9cb0..e5729a5 100644
Binary files a/Echo_Device/ppts/3_Image_Acquisition_and_Mounting.pptx and b/Echo_Device/ppts/3_Image_Acquisition_and_Mounting.pptx differ