MULTIGAS DETECTION: Keep your 4X gas detector at its most accurate with this calibration assembly. This kit has everything you need with cap, tube, and connector all included. Altair 4X is equipped to measure up to four gases in one device, designed for virtually no cross-channel interference FULL-TIME TRACEABILITY: Records 500+ alarm events and 50+ hours of data (including bump and calibration records), rechargeable Li-polymer battery with 24-hour run-time SAFETY & COMPLIANCE: LED indicates bump pass/fail with large on-screen cues, equipped with MotionAlert (man-down alarm) Feature, InstantAlert (manual alarm) Feature, and end-of-sensor-life warning RUGGED DURABILITY: Altair 4X Multigas Detectors have tough over-molded rubber armor, survives multiple 25-ft drops onto concrete, MIL-STD-810G drop protection, certified IP68 rating, dust and waterproof COMPREHENSIVE EQUIPMENT: Includes detector, performance guarantee, 4-year warranty, Bluetooth connectivity capabilities, and MSA ALTAIR Connect App access