The ACTR303/303.825/TO39 from Advanced Crystal Technology is a SAW Resonator with Frequency 303.75 to 303.9 MHz, Centre Frequency 303.825 MHz, Insertion Loss 1.5 to 2 dB, Capacitance 2.3 to 2.9 pF, Quality Factor Loaded 2000. Tags: Drop In, SAW Resonator. More details for ACTR303/303.825/TO39 can be seen below.