Conventional Smoke Detector Feature     ☆ N/O contact output, contacts closed and self-lock when alarming    ☆ New scattering technology    ☆ Unique labyrinth design protect against insect, dust, light infiltration Technical Specifications     ☆ Operating Voltage: 12VDC    ☆ Operating Current:           Standby Current: 1mA           Alarm Current: 20mA    ☆ Operating Environment:           Temperature: -10℃ +50℃           Relative Humidity: 95%    ☆ Dimensions: Diameter 100mm, Height 56mm