The ACTR433.42/433.42/TO39 from Advanced Crystal Technology is a SAW Resonator with Frequency 433.345 to 433.495 MHz, Centre Frequency 433.42 MHz, Insertion Loss 1.8 to 2.2 dB, Capacitance 1.2 to 2.7 pF, Quality Factor Loaded 2650. Tags: Drop In, SAW Resonator. More details for ACTR433.42/433.42/TO39 can be seen below.