Portable Instrument, 4XR MSA Altair 4XR, LEL 0-100%, O2 0-30%, H2S 0-200 ppm, CO 0-1999 ppm, North American Power Supply, Altair Connect App. Bluetooth, Rapid Response Sensors, Rechargeable Li-polymer Battery, Datalogging 50hrs (adjustable), 500 Events Log, Waterproof to 6ft (2m) for 1hr., MIL STD 810G-516.6 Drop Protection 25ft, Certified IP68 Rating, Class I, Div 1 Grps A, B, C &D, Class II Div 1, Grps E, F & G Class III, Div 1, CSA Approval. P/N 10178557
