The RBP-188+ from Mini Circuits is a Band Pass Filter with Frequency 138 to 238 MHz, Center Frequency 188 MHz, Insertion Loss 1.80 to 3 dB, Power 0.25 W, VSWR 1.38:1, 1.92:1. Tags: Surface Mount, Lumped Component Filter. More details for RBP-188+ can be seen below.