The VS-501 from Vectron International is a Voltage Controlled SAW Oscillator with Frequency 600 to 3000 MHz, Output Power 0 to 12 dBm, Phase noise -156 to -89 dBc/Hz, APR(pullability) ±20 ppm, Supply Voltage 3.13 to 5.25 V. More details for VS-501 can be seen below.