BW GasAlertMax XT II Confined Space Kit Includes: XT II detector (% LEL, O2, H2S, CO), power adapter, IR connectivity kit, hydrophobic (5) and particulate (5) pump filters, sampling probe, calibration gas (2.5% CH4,18% O2, 25 ppm H2S, 100 ppm CO) and 0.5 LPM regulator in a carrying case