The J2442E from Cirocomm Technology Corp is a Band Pass Filter with Center Frequency 2442 MHz, Insertion Loss 1.5 to 2 dB, Rejection 50 to 52 dB, Upper Rejection 50 to 52 dB@2580 to 2625 MHz, Ripple 0.6 to 1 dB. Tags: DIP, Ceramic Filter, Dielectric Filter. More details for J2442E can be seen below.