ITEM NAME:Mini Digital 0.36in LED 5 Bits DC 0-33.000V Voltmeter Panel Volt Voltage Meter Product Description Description: Mini Digital 0.36inch LED Display 5 Bits DC 0-33.000V Voltmeter Panel Volt Voltage Meter Tester Detector with Case for Car Home Feature: You need more double wires. Power supply is necessary. Power reverse connection protection. Wide working voltage range. Specification: Temperature coefficient: 25ppm/℃ Type: LED 0.36'' 5 bit. Range: 0-33.000V DC Precision: Â ±2 digit,0.3% Operating temperature: 10℃~65℃ Power supply voltage: 4 to 30V Red line: power + (3.5-30v). Wiring: power, black Measures: the line (0-33.000v + yellow). Size: 48 mm x 29 mm/1.88x1.14'' Product weight: 15g Product material: ABS Note: Please allow slight size differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understand. Included: 1 x Voltage Meter.Range: 0-33.000V DC. Type: LED 0.36" 5 bit. Size: 48 mm x 29 mm/1.88x1.14". Due to the different display and different light, the picture may not show the actual color of the item. If item is defective after 3 months, you can still send it back to us.