Specifications: 1) Operating voltage: DC 24V/DC12V 2) Working current: 100 - 150mA 3) Flash intensity: ≥1.2WS 4) Flash period: ≤1.5s 5) Audio alarm: &ge100dB 6) Life of flash light: ≥40,000 7) Three kinds of alarm sound: ambulance sound, pumper sound, police car sound 8) Temperature range: -10癈 ~ +55癈 9) Humidity range: ≤95%