Erm...right.
Loader first. When you turn it on (long press) it will flash green, this is RF mode to work with chip. Press the button again quickly and it will change to red, this is Pulse mode and will work without the chip.
The blue button underneath, instantly reverses teh motor to clear jams.
The RF chip has to be soldered or otherwise connected to the solenoid wires of the gun, so that it works at the same time as you fire.
Once you have it connected, in order to sync your gun and loader (only do it once) press and hold the on button on the loader, with gun on and eyes off....when it flashes slowly after switching on...fire gun and it will flash fast, indicating that it has paired with your chip.
That's about it, but someone has posted up a link to DXS instructions on another thread.
FLY on here can help you with PM7 related stuff...