Childplaymate 3-Wire Voltmeter 0.56in Mini DC 0-100V LED Display Digital Voltage Meter Voltmeter Panel Meter-2-

Features: With 3 wires, easy connection; directly use the measured voltage as a power supply (extra power supply is needed for 30V or more voltage); High precision, low starting working voltage; with reverse protection, prevent burning wires; fine adjustment function; Wire instructions: Red: power + (3.0 30V DC) Yellow: measuring voltage + (0 100V DC) Black: power supply -, measuring voltage - Specifications: Input voltage: 0-100V Measuring range: 0-100V Voltage measurement error: 0.1V Working current: <30mA Display mode: 0.28" LED Refresh rate: about 200ms/ time Line length: 19.5cm/7.68" Operating temperature: -10 ? to 65 ? Working humidity: 10% -80% Digital display color: 2(yellow) Product size: 23 x 10 x 8mm/0.91 x 0.39 x 0.31" Net weight: 5g Package inckuded:1 x DC Voltmeter LED Panel Meter