This LEGO® set 8879 is named as IR Speed Remote Control and belongs to the theme Power Functions and subtheme Power Functions.
LEGO® descripts the set 8879 - IR Speed Remote Control as follows:
Control the speed of your LEGO® Power Functions motors!
Take command of your LEGO® models with this remote control. Add a LEGO Power Functions IR Receiver, battery box and motors (sold separately) to your LEGO creations, and then use this handy remote control to control the speed!
Features 4 RC channels, 2 stop button and 2 direction control switches!