Welcome to our store! Latest version update! 1. Water temperature can be displayed up to 150 deg;. 2. The upper water temperature is displayed in red and the lower voltage is displayed in blue. Product Description Voltmeter: display range DC8.0 ~ 30.0V Voltage warning range: DC10-24V Use voltage: DC12V Operating temperature range: -10 ~ + 60 ℃ Water thermometer: display range 0 ~ 150 ℃ Temperature warning range: ≥ 99 ℃ Use voltage: DC12V Working temperature range: -10~+60℃ Instrument size: 50*40*20mm Mobile phone charging via USB: DC12-24V input voltage Working temperature range: -10~+60℃ Output voltage: DC5V Current Output: ≥ 3A Suitable for 99% of mobile phones and charging devices (If you have any questions, please let us know and we will try our best to help you solve them.) Temperature shows the water temperature