OPTEX VXS detectors 862-01-VXS-DAM-X5 OPTEX VXS detectors 862-22-VXS-RAM OPTEX Xwave2 VXS SHIELD wireless outdoor detector 862-01-VXS-RAM-LC OPTEX VX SHIELD wireless outdoor detector 862-01-VXS-AM OPTEX VXS detectors 862-01-VXS-RDAM-X5-LC OPTEX VXS wireless ready - low current detectors