The 28-36-11E from TX RX Systems is a RF Duplexer with Frequency 132 to 150 MHz, Band 1 132 to 150 MHz, Power 400 W, Insertion Loss 2.2 dB, Isolation 50 dB (Between Channel) / 100 dB (Per Channel). Tags: Rack Mount. More details for 28-36-11E can be seen below.