The CX1 AT from IQD Frequency Products is a RF Quartz Crystal with Frequency 6 to 250 MHz, Frequency Stability ±10 to ±100 ppm, Frequency Tolerance ±100 ppm, Drive Power Level 200 to 500 µW, Load Capacitance 10 to 20 pF. Tags: Surface Mount, Ceramic. More details for CX1 AT can be seen below.