The DCSR4000-5 from Synergy Microwave Corporation is a Voltage Controlled Oscillator with Frequency 4 GHz, Power 3.981 mW, Tuning Sensitivity 23 MHz/V, Tuning Voltage 0.5 to 5 V, Pulling 5 MHz. Tags: Surface Mount. More details for DCSR4000-5 can be seen below.