The PE1V31028 from Pasternack Enterprises Inc is a Voltage Controlled Oscillator with Frequency 4.245 to 4.335 GHz, Power 1 to 2 mW ( -2 to 3 dBm), Tuning Sensitivity 70 MHz/V, Tuning Voltage 0.5 to 8 V, Pulling 10 MHz. Tags: Module with Connectors. More details for PE1V31028 can be seen below.