Model No: TD-2018-CD-SFF is a High Speed Threshold Detector Designed to operate over the 2.0 to 18.0 GHz Frequency Range, with an Adjustable Threshold Level of -20 to 0 dBm, and VSWR of 3.0:1 typical. This unit comes in a very small size with SMA Female Connectors on the Input and TTL Output.