PS_D01 2 rear sensors
PS_D02 4 rear sensors
PS_D03 4 rear sensors, 2 front sensors
PS_D04 4 rear sensors, 4 front sensors

Features:
1. Stage-by-stage sound alarm
2. Optional sensor style and color
3. Human voice alarm (option)
4. Anti-freezing, rainy-proof design, work well under extreme cold weather

Technical Specifications:
1. Working voltage: DC12V2V
2. Input: 4W(max)
3. Beeper: 90-105dB
4. Working temperature: -40~+80C
5. Frequency: 40KHz
6. Alarm distance: 0.3-0.6m
7. Best detection distance: 0.4-1.5m
8. Detection distance: 0.4-2m