Features Measuring Range: 3 1/2 digit LED display ammeter with a measurement range of DC ±10A, when exceeding the range, the first digit will display 1 or ‑1, the last 3 digits will not display. Advantages: This digital current meter has the advantages of good stability, high measurement accuracy, and strong anti interference ability, convenient and practical. LED Display: This digital display current meter adopts a 0.56 inch LED display screen, which clearly and intuitively displays data, greatly improving measurement efficiency. Safe Operation: The power supply adopts polarity PROTECTI.ON circuit to ensure safe and reliable connection, and the standard installation hole ensures stable structure. Durab.le Material: The digital ammeter shell is made of excellent ABS material, which has good toughness, impact resistance, wear resistance, and long service life. Spec: Item Type: Digital Ammeter Material: ABS Measurement Range: ±10A DC Working Voltage: +5V±5% Working Current: Display: 0.56 Inch LED Installation Hole Size: Approx. 76.5 x 39mm / 3 x 1.5in Input Impedance: >1MΩ Measurement Rate: ≥2 times/s Over Range Display: First digit is displayed as 1 or -1, the last 3 digits are not Working Humidity: 10-80% (non condensing) Working Pressure: 80-106kPa Sunlight Exposure: No Direct Exposure packing list: 1 x Digital Ammeter Head Package List 1 x Digital Ammeter Head