The IQXC-42 AUTO from IQD Frequency Products is a RF Quartz Crystal with Frequency 20 to 50 MHz, Frequency Stability ±20 to ±100 ppm, Frequency Tolerance ±10 to ±100 ppm, Drive Power Level 100 µW, Load Capacitance 8 to 30 pF. Tags: Ceramic. More details for IQXC-42 AUTO can be seen below.