The VS-506 from Vectron International is a Voltage Controlled SAW Oscillator with Frequency 800 to 3000 MHz, Output Power 0 to 6 dBm, Phase noise -150 to -92 dBc/Hz, APR(pullability) ±20 ppm, Supply Voltage 3.13 to 5.25 V. More details for VS-506 can be seen below.