ATEX-certified multi-gas, wireless monitor. Welded stainless steel enclosure. Ideal for hazmat and other emergency response monitoring applications (can be used to establish a perimeter).Up to five sensors (PID, LEL, O2 and two electrochemical toxic gas). Loud buzzer and large, extra-bright warning light. Interchangeable Li-ion or alkaline battery pack. 36 hrs continuous stand-alone operation; 24 hrs continuous wireless operation. Displays: 2-line, 16-digit LCD with manually activated LED back light. Keypads: 3 operation and 4 programming keys. Size: 9.25 x 5 x 9.25 inches. Weight: 13.85 lbs.