Outfitted with rapid response MSA XCell® sensors, the ALTAIR® 4XR gas detector is the toughest 4-gas monitor on the market and is backed by a 4 years warranty. The ALTAIR® 4XR can also provide real time incident awareness to team members, supervisors, safety managers and others when paired with the MSA ALTAIR® connect app via a Bluetooth® wireless connection. MSA ALTAIR® 4XR Multi-Gas Detector, Configured, Lower Explosive Limit, Dioxygen, Carbon Monoxide Gas, 0 to 100%, 0 to 30%, 0 to 1999 ppm Detection, Alarm: 95 dB at 1 ft Audible/Battery/InstantAlert™/LEDs on Top and Bottom Visual/LEL Latching/MotionAlert™ Man-Down/Oxygen/Standard Vibrating/STEL and TWA, LCD Display, 1%, 0.1%, 1 ppm Resolution, -40 to 140 °F Operating, 110/220 VAC, 12 to 24 VDC, Rechargeable Lithium Polymer Battery, IP68 Enclosure, Rubberized Overmold Housing Material, 3 in W x 1.4 in D x 4.4 in H Dimensions