The VS-507 from Vectron International is a Voltage Controlled SAW Oscillator with Frequency 3000 to 6000 MHz, Output Power 0 to 6 dBm, Phase noise -146 to -86 dBc/Hz, APR(pullability) ±5 ppm, Supply Voltage 3.13 to 3.465 V. More details for VS-507 can be seen below.