Specifications Brand MOESModel ES1ZZ TY Working voltage 3V 1x CR123A CR17335 Lithium Battery Visual alarm signal red LED indicatorSound Level 85dB at 3m straight ahead Working temperature 0℃ 55℃Working humidity 95 RH no condensation Mounting wall mounting or ceiling mountingFeatures 1 Real time smoke detect and high decibel alert for fire prevention 2 Remote monitoring and notification via Zigbe connectivity 3 Self test function ensures continued proper operation 4 Low battery alert for uninterrupted safety management 5 Wide application suitable for homes offices and factories 6 Easy ceiling or wall installation with compact design Package Includes 1x Smoke Alarm1x Mounting Bracket 1x Manual3x Screw3x Anchor Plug