TK10 is a GUI for the Bottlerocket program. It provides a graphical interface for controlling X10 modules that come with the X10 Firecracker kit. TK10 is designed to mimic the look and functionality of the HR12A controller unit that comes with the X10 Firecracker kit. If you are familiar with the HR12A, then you will find TK10 very easy to use. The on/off/dim buttons, device letter dial, and device number range switch work just like in the HR12A, and you can also edit the device labels.