The RSO1681AM from Roswin is a Voltage Controlled Oscillator with Frequency 1669 to 1693 MHz, Power 1.585 mW, Tuning Sensitivity 9 MHz/V, Tuning Voltage 0.25 to 4.75 Vdc, Phase Noise -120 dBc/Hz. Tags: Surface Mount. More details for RSO1681AM can be seen below.