From old datasheet system Opto-Electronic Device - Visible Light Emitting Diodes - Point-Lighting LEDs Square Type 5.0mm X 2.0mm Series 方形五点零毫米2.0系列 Microprocessor crystal; Frequency:12MHz; Frequency Tolerance:20ppm; Load Capacitance:18pF; crystal Terminals:Radial Leaded; ESR:30ohm; Leaded Process Compatible:Yes; Mounting Type:Through Hole; No. of Pins:2 RoHS Compliant: Yes 方形五点零毫米2.0系列