these autonomous smoke detectors (DAF) meet the standard EN 14604, it allows the person to install itself, the notes are attached, change the pils, test, dust; on the detector there is any information regarding his factory. The test button is now the siren diffuses well 85 decibels. It lacks a certificate DAF for housing fire insurance. So: Certification: I, the undersigned (first name of the insured) holder Contract No. ..... attests have installed one or more standard smoke detector at (address) in accordance with DIN EN 14604