The RSO1850AM from Roswin is a Voltage Controlled Oscillator with Frequency 1800 to 1900 MHz, Power 5.012 mW, Tuning Sensitivity 36 MHz/V, Tuning Voltage 0 to 4.5 Vdc, Phase Noise -109 dBc/Hz. Tags: Surface Mount. More details for RSO1850AM can be seen below.