The SMU4 from Jauch Quartz is a RF Quartz Crystal with Frequency 3.276 to 33 MHz, Frequency Stability ±20 ppm, ±30 ppm ±50 ppm, ±100 ppm, ±150 ppm, Frequency Tolerance ±20 to 50 ppm, Drive Power Level 500 µW, Load Capacitance 12 to 32 pF. Tags: Surface Mount. More details for SMU4 can be seen below.