I checked their documentation. Their www site says they do no have it on line, so they say to call for assistance: "We're sorry, but documentation for the product or features selected was not found, or is not currently available on our website. Please call 1-888-830-1326"
Here are the instructions for the "C" model. You could see if you could get enough infor out of them to understand how yours works. Or you could ask at the number above