Features:
·3 color digital LED display
·Stage-by-stage sound alarm
·Optional sensor style and color
·Human voice alarm (option)
·Anti-freezing, rainy-proof design, work well under extreme cold weather

Specifications:
·Working voltage: DC12V +/- 2V      
·Power Input: 5W(max)
·Beeper: 80dB
·Working temperature: -40~+80°C
·Frequency: 40KHz
·Detection distance: 0.4-2m