The CRO3956A-LF from Z-COMM is a Voltage Controlled Oscillator with Frequency 3951 to 3961 MHz, Power 1.585 mW, Tuning Sensitivity 11 MHz/V, Tuning Voltage 0.5 to 4.5 V, Pulling 0.5 MHz. Tags: Surface Mount. More details for CRO3956A-LF can be seen below.