the astro c40 tr controller is a fully customizable, high-quality pro controller built for the serious gamer. durable and serviceable, the c40 tr controller features swappable, replaceable analog stick and d-pad modules as well as remappable rear buttons, allowing for multiple configurations and increased speed and accuracy for any playstyle and any genre. seamless performance in wired or wireless modes with high-fidelity wireless audio. free software to create and share custom controller profiles. with up to 12+ hours of battery life, the c40 tr controller is made to outlast your game. connect your controller to your computer using the included usb cable or usb wireless transmitter. make sure your controller is in wired mode if connecting via usb cable, or in wireless mode if connecting using the usb wireless transmitter. after you remove the faceplate and swap in the new module, please re-calibrate the controller again to avoid stick drift, unintended activations, or unresponsive modules. to re-calibrate, make sure the faceplate is secured correctly back on, then hold the program button on the back of the controller, let it vibrate once then don't touch it for about 20-30 seconds. when re-calibration is complete the controller will vibrate again with the led light blinking white twice.