The ACTR4100/310.0/QCC8C from Advanced Crystal Technology is a SAW Resonator with Frequency 309.925 to 310.075 MHz, Centre Frequency 310 MHz, Insertion Loss 1.3 to 1.8 dB, Capacitance 2.6 to 3.2 pF, Quality Factor Loaded 1700. Tags: Surface Mount, SAW Resonator. More details for ACTR4100/310.0/QCC8C can be seen below.