The B038NC4S from Knowles Precision Devices is a Band-Pass Filter with a passband from 3.4 to 4.2 GHz. It has an insertion loss of less than 2.25 and provides more than 40 dB of rejection above and below the passband. This filter utilizes DLI’s low loss temperature stable materials which offer small size and minimal performance variation over temperature. It is available in a fully shielded surface-mount package that measures 13.970 x 5.588 x 2.743 mm.