Model TD-30T-SHS-218-30M450 is a Threshold Detector designed for operation between the 30 to 450 MHz Frequency Range, having a VSWR input of 3.0:1 @ -20 dBm and a Dynamic Range of -20 dBm to +10 dBm. The size is 2.20" x 1.50" x 0.40".
Additional Product Information under, http://www.planarmonolithics.com/products/TD-30T-SHS-218-30M450.htm