The 2927 from KR Electronics (A Division of NIC) is a Low Pass RF Filter with Frequency DC to 440 MHz, Stopband Frequency 520 MHz, 3 dB Cutoff Frequency 440 MHz, Lower Rejection 40 dB@520 MHz, Upper Rejection 3 dB@520 MHz. Tags: Surface Mount. More details for 2927 can be seen below.