Drive more safely in freezing weather. This kit uses a flashing LED to indicate a road temperature close to freezing point ; below that point the LED is on continuously. A reliable temperature sensor with mounting stud is included.
Specifications:

1. power supply: 10 - 15VDC / 25mA
2. PCB dimensions: 56 x 42mm / 2.2 x 1.7"

resistor_colour_code.pdf

module_diy_kit_guide.pdf

manual_wsaa2644.pdf