The CVCO55CC-4124-4238 from Crystek Corporation is a Voltage Controlled Oscillator with Frequency 4.124 to 4.238 GHz, Power 7.943 mW, Tuning Sensitivity 22 MHz/V, Tuning Voltage 0.1 to 16 V, Pulling 2.5 to 5 MHz. Tags: Surface Mount. More details for CVCO55CC-4124-4238 can be seen below.