With digital display, intuitive observation. Parameter display accuracy and stability, low power consumption. Easy installation, stable performance, anti vibrations and anti bump. When the alarm that is displayed flashing alarm. Name: Round digital water temperature and voltage meter Display: water temperature + voltage Temperature sensor of screw diameter: 10mm For 12.0V/24V car or trunk Power Supplies: Direct Current 9V - 36V Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Word Color:red Colour:Photo Color Material:plastic Package Contents: 1 x Car 2 in 1 Gauge with Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.