The VCO-4290 from RF Bay is a Voltage Controlled Oscillator with Frequency 4.245 to 4.335 GHz, Power 1.995 mW, Tuning Sensitivity 70 MHz/V, Tuning Voltage 0.5 to 8 V, Pulling 10 MHz. Tags: Module with Connectors. More details for VCO-4290 can be seen below.