Produino ST Master Chip 0.56" LED 3-Digital DC Voltmeter - Black (3.5~30V)
Technical parameters: Measuring range: 3.5~30V; Minimum input: below the minimum voltage measurement inaccurate or does not show; Maximum input: DC 30V (This voltage is higher than the risk of burnt); Tolerance: 10V or less accurate to 0.01V the allowable error of 1% (+/-1 word); Display: 0.56" LED 3-digital tube; Display color: red; Refresh rate: about 500mS / times; Power supply: No power supply; Current consumption: less than 20mA typically 5~15mA; Working temperature: -10'C~65'C