The HC49/T from IQD Frequency Products is a RF Quartz Crystal with Frequency 4 to 270 MHz, Frequency Stability ±15 to ±100 ppm, Frequency Tolerance ±5 to ±100 ppm, Drive Power Level 1 mW, Load Capacitance 10 to 75 pF. Tags: Surface Mount, Ceramic. More details for HC49/T can be seen below.