Cigarette Charger Battery Volt Meter With Temp and Time

Bought this gadget when I was in Singapore and decided to install in our campervan.  You are able to check both the temperature inside and outside the vehicle and it comes with a volt meter reading that gives out an alarm when the battery is low. 

Installation was simple, I used a double side tape and glue to the dashboard. The temp sensor cable just tuck away behind the dashboard to left passenger door where I stick the sensor outside the vehicle.