diff --git a/mef_matlab/matlab/MEF_2p1/@MEFSession_2p1/get_info_data.m b/mef_matlab/matlab/MEF_2p1/@MEFSession_2p1/get_info_data.m
index a06d4e8..95a540b 100644
--- a/mef_matlab/matlab/MEF_2p1/@MEFSession_2p1/get_info_data.m
+++ b/mef_matlab/matlab/MEF_2p1/@MEFSession_2p1/get_info_data.m
@@ -45,10 +45,10 @@
 var_names = {'ChannelName','ChannelNumber','SamplingFreq','Begin','Stop','Samples',...
     'IndexEntry','DiscountinuityEntry','SubjectEncryption',...
     'SessionEncryption','DataEncryption','Version','Institution',...
-    'SubjectID', 'AcquisitionSystem', 'CompressionAlgorithm', 'Continuity'};
+    'SubjectID', 'AcquisitionSystem', 'CompressionAlgorithm', 'Continuity', 'voltage_conversion_factor'};
 var_types = {'string', 'int32','double', 'double', 'double', 'double', 'double',...
     'double', 'logical', 'logical', 'logical', 'string', 'string', 'string',...
-    'string', 'string', 'cell'};
+    'string', 'string', 'cell', 'double'};
 
 chan_list = dir(fullfile(sess_path, '*.mef')); % assume all channel data in one dir
 if isempty(chan_list)
@@ -89,9 +89,10 @@
         sess_info.AcquisitionSystem(k) = header_k.acquisition_system;
         sess_info.CompressionAlgorithm(k) = header_k.compression_algorithm;
         sess_info.Continuity{k} = seg_cont_k;
+        sess_info.voltage_conversion_factor(k) = header_k.voltage_conversion_factor;
     end % for
 end % if
 
 end
 
-% [EOF]
\ No newline at end of file
+% [EOF]
diff --git a/mef_matlab/matlab/MEF_2p1/@MEFSession_2p1/import_sess.m b/mef_matlab/matlab/MEF_2p1/@MEFSession_2p1/import_sess.m
index d107e70..5d0f820 100644
--- a/mef_matlab/matlab/MEF_2p1/@MEFSession_2p1/import_sess.m
+++ b/mef_matlab/matlab/MEF_2p1/@MEFSession_2p1/import_sess.m
@@ -61,7 +61,8 @@
         'SubjectPassword', pw.Subject, 'SessionPassword', pw.Session,...
         'DataPassword', pw.Data);
     x_k = x_k(:).'; % make sure it is a horizontal vector
-    
+    % voltage scale adjustment
+    x_k = x_k*this.SessionInformation.voltage_conversion_factor(k);
     X = cat(1, X, x_k);
 end % for
 
@@ -89,4 +90,4 @@
 
 end % function
 
-% [EOF]
\ No newline at end of file
+% [EOF]