1、2 in 1 design, voltmeter and ammeter, make you get the data at the same time. 2、LED display design gives you quick reading, can make you distinguish voltage and current easily. 3、This product is made of high quality materials with dustproof processing, reliable and durable for long time use. 4、Measuring range is DC 0-100V, with reverse polarity protection and common ground design, don't need to worry the damage caused by reverse polarity. 5、Easy to install and use, suitable for various uses. Features: 2 in 1 design, voltmeter and ammeter, make you get the data at the same time. This product is made of high quality materials with dustproof processing, reliable and durable for long time use. Measuring range is DC 0-100V, with reverse polarity protection and common ground design, don't need to worry the damage caused by reverse polarity. Easy to install and use, suitable for various uses. Specification: Material: Plastic Working current of Meter itself: ≤20mA Current Measuring range: DC 0-50A, DC0-10A Current resolution (A): 0.01A Measure accuracy: 1% (±1 digit) Display: 0.28" digital tube, Two color Blue and Red Refresh rate: about 300mS/ times Working temperature: - 10 ℃ ~ + 65 ℃ Working humidity: 10-80% (no condensation) Size: approx. 48 x 29 x 26mm Operation Temperature: -10℃~+65℃ Size: approx. 48*29*21mm / 1.89*1.14*0.83in Weight: approx. 26g Package list: 1 * Digital Voltmeter Ammeter 2 * Wire