I am curious as to what they mean too.
I have also been trying to figure out the REB, REQ, etc. prefixes on other tools.
I have not found an explanation or anything to decrypt that code yet.
Special features of CTL26 E SD
– CTL 26 E SD E/A: Socket module with automatic
switch-on function for the use of two electric
power tools: e.g. 2 sanders, 1 jigsaw + 1 sander
– CTL 26 E SD: Socket module with permanent
power supply for use as extension cable: e.g.
charger, lamp, etc.
AC = AutoClean
LE = Automatic on/off switch for air tools