The ACTR540/433.42/QCC8C from Advanced Crystal Technology is a SAW Resonator with Frequency 433.345 to 433.495 MHz, Centre Frequency 433.42 MHz, Insertion Loss 1.5 to 2 dB, Capacitance 2.25 to 2.85 pF, Quality Factor Loaded 1200. Tags: Surface Mount, SAW Resonator. More details for ACTR540/433.42/QCC8C can be seen below.