Model Number: smoke ALARM :YG--05N-25 Brand Name: Wolf-Guard Key Specifications/Special Features: Specifications:*Adopt high performance photoelectric detecting element; has high stability and sensitivity;*Have self-detecting function;*9V6F22 battery operated(included);*Built-in siren:can work independently or together with alarm system;*Can detect both Smoke and Temperature.Features:Ceiling or wall mountingEasy to install with mounting hardware included 9V battery operated (included)Suitable for any roomTest button for easy recommended monthly testingLow battery signalSafety clip feature, not allow mounting of smoke alarm without battery installedIonization chamber for early detection from all directionsLoud 85dB alarm signalPacking:

• Host size: 106 x 30mmGross weight: 171gSize: 110 x 110 x 45mm