Durable, wear-resistant construction: made from high-quality materials for long service life and reliable everyday use. Measures inside and outside temperature: a true dual-purpose digital thermometer that displays cabin temperature and outdoor temperature so you can monitor both at a glance. Easy installation: plugs into the car cigarette lighter / charger socket for power. The external sensor/display can be fixed in a visible spot using double-sided tape (included or user-supplied). Clear LCD digital display: large screen and big, easy-to-read characters make checking temperatures quick and convenient while driving. Practical compatibility: designed to work with any vehicle that has a standard cigarette lighter/charger socket (cars, trucks, RVs, etc.). How this helps you Improve comfort and HVAC control: see cabin temperature instantly so you can adjust air conditioning or heating for a comfortable ride. Increase safety and readiness: monitor outside temperature to anticipate icy conditions or heat extremes before you drive. Protect passengers and cargo: keep an eye on cabin temperature for children, pets, or temperature-sensitive items during trips or stops. Typical use scenarios 1. Daily commuting — plug it in, mount the display on the dash or windshield area, and check inside/outside temps while adjusting climate controls. 2. Winter driving — monitor outside temperature at startup to detect freezing conditions and help prevent slippery-road surprises. 3. Road trips and RV use — keep track of interior and exterior temperatures to maintain comfort and protect cargo or pets during long journeys or when parked. Features at a glance Dual indoor/outdoor temperature measurement Plug-in power via car cigarette lighter/charger socket Mountable in a visible location using double-sided tape Large, easy-to-read LCD digital display Durable, wear-resistant construction for extended use Simple, reliable temperature monitoring for everyday driving and travel.