The VCO580-620 from Dynamic Engineers is a Voltage Controlled Oscillator with Frequency 580 to 620 MHz, Tuning Sensitivity 15 MHz/V, Tuning Voltage 0.5 to 4.5 V, Phase Noise -116 dBc/Hz, Phase Noise dBc/Hz @10kHz -116 dBc/Hz. Tags: Surface Mount. More details for VCO580-620 can be seen below.