The HC49/4H AUTO from IQD Frequency Products is a RF Quartz Crystal with Frequency 3.01 to 100 MHz, Frequency Stability ±50 to ±150 ppm, Frequency Tolerance ±50 ppm, Drive Power Level 50 to 300 µW, Load Capacitance 3 to 75 pF. Tags: Thru Hole. More details for HC49/4H AUTO can be seen below.