Quantitative Respirator Fit TesterAlcohol type (100% reagent grade isopropyl)+/- 10% accuracyFit factor range (1 to > 10,000)Particle size range 0.02 to > 1 micrometer3 hour battery lifeSample flow rate 650 cc/min8 hours per alcohol charge at 70°FTemperature: 32°F to 100°FSize: 9.5" x 7.5" x 5.5"Weight: 4.2 lbs (with battery)