The MSA ALTAIR 4XR Gas Detector is one of the strongest reliable 4-gas monitors. Its unique MSA XCell sensors are among the swiftest in the world, and when connected with the MSA ALTAIR Connect app, can provide real-time notifications to supervisors, team members, or safety personnel. In Real-time The Altair 4XR allows users to sense gas 2 times faster than the industry average. Quickly update MSA ALTAIR 4XR settings via the ALTAIR Connect app. Send event notifications via text message with the ALTAIR Connect app. Rugged, reliable units are built to last. Survives 25 drops from 4 feet (1.2 meters) (MIL-STD-810G drop protection). Can survive an incidental 25-foot (7.5-m) drop onto concrete. Dust and waterproof IP68 rating (2 meters for at least 1 hour). Operating temperature range: -40°F to +140°F (-40°C to +60°C). Covered by a 4-year instrument and sensor warranty. Confirm compliance quickly with the Bump LED and on-screen checkmark. Bump and calibrate with 1/2 the test gas and in 1/2 the time vs. industry average. Bump and calibrate at a specified "Time of Day" with your MSA GALAXY GX2 Automated Test System. Motion Alert option tells others that the user has become immobile. User-activated Instant Alert notifies others of a potentially dangerous situation. Bluetooth connectivity standard. This unit comes with a 4-gas cylinder and Regulator and ALTAIR Pump Probe.