Radiation-measuring instruments; Audio-video receivers; Ear phones; Hand scanner; Batteries and battery chargers; Scientific instruments, namely, electronic analyzers for measuring, testing and detecting contaminants and environmental pollutants; Digital plotters; Electronic writing tablets; GPS tracking devices; Infrared detection apparatus; Portable digital electronic scales; Electronic circuits, namely, flip-flops; Ozone generators for calibration purposes; Smart cameras; Spotting scopes