The CX4HT AT from IQD Frequency Products is a RF Quartz Crystal with Frequency 14 to 250 MHz, Frequency Stability ±125 to ±300 ppm, Frequency Tolerance ±100 ppm, Drive Power Level 200 µW, Load Capacitance 10 pF. Tags: Ceramic. More details for CX4HT AT can be seen below.