Features: With digital display, intuitive observation. Parameter display accuracy and stability, low power consumption. Simple installation, stable performance, anti vibrations and anti bump. Constructed from high quality pc material, which is flame resistant, impact resistant, resistant and durable. Suitable for 12v voltage vehicles, such as, for cars, motorcycle, bus, ship, rv, yacht, trailer,etc. Specifications: Screen color: red / blue Material: PC Size: 3.7 x 3.5cm Hole size: 2.7cm Input voltage: 12v Working temperature: -40 ~ 80 ℃ Package Includes: 1 x Temperature Tester 1 x Standard Thread Fixing Ring Terminal 2 x Protective note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!