Because the OmniPro II is a UL listed panel, and any connected zone going off incorrectly has the potential of calling the police and fire department, Leviton smartly limited wireless to those they have fully tested and certified. Although you may be tempted to jury-rig something, I do not recommend it. Use one of the wireless sensors they sell. I think the GE Wireless Receiver Interface 42A00-2 is best, and the sensors are cheap, widely available, and super reliable.