The MC4A1842S75DCA from Sainty-Tech Communications Limited is a Band Pass Filter with Frequency 1805 to 1880 MHz, Bandwidth 75 MHz, Center Frequency 1842.5 MHz, Insertion Loss 2.5 dB, Upper Rejection 35 dB. Tags: Surface Mount, Monoblock Filter, Dielectric Filter. More details for MC4A1842S75DCA can be seen below.