QP2222 in Car Volt Meter/Thermometer

Absolute plug and play - simply plug it into an available cigarette lighter socket and you’re good to go! Whenever power is applied, it will provide you with battery / system voltage, and current temperature.
Features:
Features:
- Dual function display
- No installation required
- Bright LED screen
Temperature Meter: -10 ~ 80°C
Temperature Resolution: 0.1°C
LED: Blue+Red