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Gas Leak Detector, Natural Gas Detector with Audible and Visual Alarm, Portable Gas Sniffer for Home RV, High Sensitivit [High and Low Sensitivity Mode] The gas leak detector has double mode detection Low sensitivity: 500 to 1000 ppm; High sSensereo 
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ThXYZGTYUJ Portable Industry H2/CO/PH3/CO2/H2S/NH3/O2/NO2/NO/EX/CH4 Gas Detector Combustible Gas Alarm Detetcor USB Charge 0-100% L 1. 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A USB-CLEVSUPTY LEVSUPTY 5 Pack Wireless Interconnected Photoelectric Smoke Alarm | AS3786 Certified |10 Year Battery Life | Australian 【STANDARD BUNDLE】 5 x Smoke Alarm, 1 x Remote【PRE LINKED】 This bundle has been ‘Pre Linked’ for your convenience. 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