The NANO-ERF Series from Pole/Zero is a Tunable Filter with Frequency 30 to 520 MHz, Bandwidth 9.8 to 49 MHz, Insertion Loss 3.2 to 8 dB, Supply Voltage 3.135 to 3.6 V, Supply Current 15 to 30 mA. Tags: Surface Mount, Digitally Controlled. More details for NANO-ERF Series can be seen below.