It is automatically engaged everytime you read. The unit runs for the = number of minutes you have set, then it shuts down. >>> curtis@xxxxxxxxxx Monday, September 13, 2004 10:46:45 AM >>> Hi everyone. Does one have to go into the settings keypad to engage the = sleep timer or is there a hot key for it I am missing somewhere. I know = where to change the setting I.E. 30 minutes, 45 minutes, etc. but where=20 do you engage it exactly? *smile* Curtis Delzer