have to buy gas detectors for the reasonable price .lieferung as always fast. the equipment was state on delivery in perfect. unpacked used batteries to the supplied AC adapter is losing everything ok. hab then after 1 hour. power supply disconnected for 2 min. warning tone and flashing light again everything connected to the power supply ok. knew immediately came with the part. description clearly understandable. Test function also immediately clear. The alarm can be fortuitous in the whole house. now after etwae 2 weeks I made the gas test einfch a lighter without igniting so only lighter gas to unit held 5 sec. Then went the alarm going only keep the test button pressed longer, everything .to back off ok.
