RKI Confined Space 4-Gas Monitor Kit, Series: GX-3R, CH4, O2, H2S, CO, Detection Range: 0 to 100% CH4, 0 to 200 ppm H2S, 0 to 2000 ppm CO, Alarm: Audible, Visual, Vibrating, Digital LCD, 1% LEL, 0.1 ppm H2S, 1 ppm CO Resolution, -20 to 50 deg C, 100 to 240 VAC, Lithium-Ion Battery, IP66/IP68, 2.55 in H x 2.2 in W x 1.02 in D (without Rubber Boot), 2.63 in H x 2.4 in W x 1.06 in D (with Rubber Boot), Includes: Pump with 10 ft Hose and Probe, Charger, Screwdriver, Carrying Case