1.9 IQ Force components 1. Case: The instrument is enclosed in a solid PC (polycarbonate) case with TPE (rubber) overmold. 2. Front face: The front face of the instrument houses the MODE button, LCD (liquid crystal display, LED alarm light, IrDA port, and audible alarm. Display: A liquid crystal display (LCD) shows readings, messages, and other information. Alarm light: Atop- and front-mounted LED (light emitting diode) alarm lights to provide a visual indication of alarm state. The light emits a bright red light when the instrument is in alarm. Infrared Port: The infrared port is located next to the MODE button on the front face of the instrument. The infrared port is used for communications between the IQ Force, a PC, or IQ Force Dock.