The LP1000CH3-0S from R & K Company Limited is a Low Pass RF Filter with Frequency DC to 1 GHz, Stopband Frequency 2000 to 4000 MHZ, 3 dB Cutoff Frequency 1000 MHz, Insertion Loss 1 dB, Rejection 45 dB. Tags: Module with Connector, Chebyshev Filter. More details for LP1000CH3-0S can be seen below.