The new RC Tracked Racer is currently the only way to obtain the Lego infrared (IR) transmitter/reciever remote control in shops. I picked it up yesterday as it’s been released long enough to be discounted.
It’s quite a nice design, the battery box is mounted low and centrally. Each track is driven by it’s own medium motor, one mounted forward and the other rearward. The car body flips forwards to allow good access to the battery box switch.