Welcome to our store! 1. High-quality dual-wire 2.5-30V DC voltmeter, practical and durable. 2. Adjustable voltage resistor, clockwise to reduce voltage, can work directly under 5V, 9V, 12V, 24V. 3. The line has a reverse connection protection function. 4. High precision, safe and reliable to use. 5. 0.36-inch digital LED display, convenient for reading data. Features: High-quality dual-wire 2.5-30V DC voltmeter, practical and durable. Adjustable voltage resistor, clockwise to reduce voltage, can work directly under 5V, 9V, 12V, 24V. The line has a reverse connection protection function. High precision, safe and reliable to use. 0.36-inch digital LED display, convenient for reading data. Specification: Material: Plastic Weight: 7g/0.2oz Working Voltage: 2.5-30V Test Voltage: 2.5-30V Working Current: less than 30mA Mounting Opening Size: 23*14.5mm Measurement Speed: 200 mS/time Measurement Accuracy: 3% Display Color: Red, Yellow, Green, Blue (Optional) Package List: 1* LED Digital Voltmeter 1* Cable Your 100% satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!