The LFSW190410-12 from Synergy Microwave Corporation is a Frequency Synthesizer with Frequency 1.9 to 4.1 GHz, Step Size 125 KHz, Reference Frequency 10 MHz, Output Power 7 dBm, Supply Voltage 5 V. Tags: Surface Mount, PLL Frequency Synthesizer. More details for LFSW190410-12 can be seen below.