Confined space detector. One button operation. Real time gas readings for up to 4 gases. Easy-to-read front-mounted backlit graphic display. IrDA port for communication with PC. Rated IPX5 for protection against water ingress. Exceeds IEC 1000-4-3 for level 3 RFI immunity specifications. Powered by the MultiPro battery. Automatic low flow alarm. Automatic leak test before every use. Warning, Danger, STEL and TWA alarms. Bright LED alarm light. Field replaceable sensors. Calibration due reminder. UL Class I Division 1 Groups A,B,C,D Temp Code T4.