The BP56R881S65A from Sangshin is a Band Pass Filter with Frequency 849 to 914 MHz, Bandwidth 65 MHz, Center Frequency 881.5 MHz, Insertion Loss 1.3 to 2 dB, Upper Rejection 30 to 40 dB. Tags: Surface Mount, Dielectric Filter. More details for BP56R881S65A can be seen below.