- Dual temperature display for inside and outside the vehicle - Compatible with 12V and 24V car systems; ultra-simple installation - Designed for vehicle use with high temperature and vibration resistance - Adjustable bracket for flexible mounting and secure positioning - Includes 5-meter cable for external temperature probe - Low power consumption with energy-saving performance - Temperature measurement range: Inside: -20C to +70C Outside: -50C to +70C Installation: 1. Mount the device inside the vehicle, place the outdoor probe outside the door, insert an AG10 battery; the LCD will display the current indoor and outdoor temperatures. 2. Connect to the cars power supply to activate the blue backlight. 3. If no vehicle power is available, the device will still measure internal and external temperatures without backlight.Package includes: 1 x Thermometer 1 x User Manual 1 x Charging Cable