-------- Original Message -------- From: cubbettee cubbettee <[log in to unmask]> Date: Wed, September 30, 2015 7:36 pm Thanks for the information.Yep that is what the slot is for and although it is empty, when you hit the function wireless you can still turn it on and off I have one old laptop with this sort of slot -- old enough that it has an 802.11b ([log in to unmask]) wifi interface built in -- I got an 802.11g card at the same time, so the built-in rarely got turned on. Could that be what's being turned on and off in this case on your computer? David PCSOFT's List Owners: Bob Wright<[log in to unmask]> Mark Rode<[log in to unmask]>