10092521 Type: Gas Hydrogen Sulfide (part# 10092521) This item features: -Rated to IP67 protection levels for dust /water ingress. -Triple -alarm system featuring two bright flashing LEDs, a piercing audible alarm, and a vibrating alarm. -Price is for 1 Each. Testing and approvals: -Rated IP67 for superior dust and water protection, and high resistance to RFI.