BW Technologies MC2-C01-MC5 Multi-Unit 5 Cradle Charger, for GasAlertMicroClip XT Gas Detector: Explosive Gas Detectors: Amazon.com: Tools & Home Improvement
BW Technologies GasAlertMicroClip X3 Black Multi-Gas Monitor MCX3-XW0M-B-NA, Combustible (% LEL filtered), Oxygen (O2), Carbon Monoxide (CO), North American version | RSHughes.com
GasAlert MicroClip X3 Calibration and Bump Test Guide - YouTube
Small size. Easy to use. Reliable operation. Affordable protection.