4tronix BitBot PRO Intelligent Robot for Microbit Range - 4tronix IR4KIT, 4tronix IR4KIT 4tronix Infrared Keypad & Receiver - This kit includes all you need to start controlling your 4tronix Microbit robot using a small InfraRed keypad. The full kit includes a dongle that is to be connected to the front connector on your robot (note that this means you can't also plug in another addon at the same time). You can also just purchase the keypad or just the receiver dongle. Note that for the BitBot PRO, you do not need to purchase the dongle because the receiver is already incorporated into the product. The keypad has a range of over 5m in direct line of sight with the IR keypad pointing directly at the receiver on the robot. Also be aware that all receivers and keypads are the same, so one keypad can control many robots. As it is very directional, this is not usually a big issue even in a busy classroom. The Makecode extension for BitBot PRO includes the infrared blocks in the "BitBot