The TC0149E from Tai-Saw Technology is a SAW Resonator with Frequency 423.145 to 423.295 MHz, Centre Frequency 423.22 MHz, Insertion Loss 1.2 to 2.5 dB, Capacitance 3.8 pF, Quality Factor Unloaded 15000. Tags: Surface Mount, SAW Resonator. More details for TC0149E can be seen below.