The MAXI-1.5-4-2-SMA from Pole/Zero is a Tunable Filter with Frequency 1.5 to 4 MHz, Bandwidth 0.125 MHz, Insertion Loss 2 dB, Supply Voltage 5 to 100 V, Supply Current 10 to 500 mA. Tags: Module with Connectors, Digitally Controlled. More details for MAXI-1.5-4-2-SMA can be seen below.