The RCF-868.000-20000-2012-W-TR-001 from Raltron is a Low Pass RF Filter with Frequency 858 to 878 MHz, Bandwidth 20 MHz, Stopband Frequency 1716 to 2634 MHz, Insertion Loss 0.5 to 0.65 dB, Rejection 30 to 40 dB. Tags: Surface Mount, Ceramic Filter. More details for RCF-868.000-20000-2012-W-TR-001 can be seen below.