Produino 2 in 1 ST Master Chip 0.36" LED 3-Digital Thermometers Voltmeter - Black (DC 3.5~30V)
Technical parameters: Measuring range: DC 3.5~30V; Measuring temperature: -10'C~70'C;Automatic Switching;Tolerance: 1% (+/-1 words); Display: 0.36" LED 3-digital tube; Display color: red; Refresh rate: about 500mS / times; Current consumption: less than 20mA typically 5~15mA Working temperature: -10'C~65'C