Features: 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 Technical Specifications: Working voltage: DC12V2V Input: 4W(max) Beeper: 90-105dB Working temperature: -40~+80ípC Frequency: 40KHz Alarm distance: 0.3-0.6m Best detection distance: 0.4-1.5m Detection distance: 0.4-2m 45*33*34cm
