diff --git a/README.md b/README.md
index f03a003..40bfa22 100644
--- a/README.md
+++ b/README.md
@@ -308,10 +308,13 @@ will take you to the main menu. The following is a short description of each scr
   or previous data point.
 - `Average range` - show stats between two times. This has the same controls as
   the "Stats by" screen above.
-- `Export` - export data to a plugged in USB drive. Only file-systems detected by
-  [fstyp(8)][11] are supported. If a drive with an unsupported file-system, or
-  no file-system, is selected, you will be prompted to format it as FAT32.
-- `Blank display` - turn of the display. Press any button to cancel. You must
+- `Export` - export data to a plugged in USB drive. Only file-systems detected
+  by [fstyp(8)][11] are supported. If a drive with an unsupported file-system,
+  or no file-system, is selected, you will be prompted to format it as
+  FAT32. Exports can be done in both sqlite3 and CSV format. The temperature is
+  in deci-Kelvin (1/10 of a kelvin) and the humidity is an integer percent
+  (ex. 53% would just be 53). The time is seconds since January 1, 1970 UTC.
+- `Blank display` - turn off the display. Press any button to cancel. You must
   have specified a "bl_pin" in the config file.
 - `Power options` - re-initialize the program, shutdown or reboot the device
 - `View date/time` - show the current date and time down to the second