The PDSBF4-3/4-4C8 from Sainty-Tech Communications Limited is a Switched Filter Bank with Frequency 3 to 4 GHz, Band 1 3 to 3.25 GHz, Band 2 3.25 to 3.5 GHz, Band 3 3.5 to 3.75 GHz, Insertion Loss 9 dB. Tags: Die. More details for PDSBF4-3/4-4C8 can be seen below.