Four In One Gas Detector Oxygen Carbon Monoxide Hydrogen Sulfide Combustible Gas Detector Toxic And Harmful Gas Alarm Blades there are two alarm points

there are two alarm points of low concentration and high concentration

walking and sports outdoor at night

[ANTI-SLIP TEXTURE] This product is designed with anti-slip texture

Intriduction:

Accurate Double Thousand Bits

Four In One Gas Detector Oxygen Carbon Monoxide Hydrogen Sulfide Combustible Gas Detector Toxic And Harmful Gas Alarm Blades there are two alarm pointsShips FREE Handling Day: 1 3 Days, Arriving Day: 15 35 Days[SHORTDESCRIPTION] Packing List Alarm * 1 Features Sound light shock triple alarmPut the instrument in the space that needs to be tested, if the gas master specified concentration value, there will be sound, S flash, vibration alarm, to avoid unnecessary losses. Built in battery charge directlyPortable fast charging, a variety of charging methods, with the use of charging, plug charging mobile