The CVCO55CLM-0840-0870 from Crystek Corporation is a Voltage Controlled Oscillator with Frequency 840 to 870 MHz, Power 1.585 mW, Tuning Sensitivity 14 MHz/V, Tuning Voltage 0.3 to 4.7 V, Pulling 0.5 to 1 MHz. Tags: Surface Mount. More details for CVCO55CLM-0840-0870 can be seen below.