Features: 1.Safety Improvement: DC voltage and current are displayed on the same screen. Two wire system has a wide voltage range with reverse connection protection. 2.Convenient Operation: Manufactured by exquisite workmanship and equipped with calibration potentiometer, and you can manually calibrate the error. Current sensor is adopted with perforated design, and wire can directly through the hole can detect the current. 3.Wide Applicability: You can measure the current of the positive terminal, the negative terminal and a line or device in the line, or you can test the voltage or current of two completely isolated devices. 4.High Reliability: Our voltage ammeter has high resistance to current impact, will not be damaged by current impact ammeter. 5.Durable Performance: This volt meter has been rigorously tested and has great precision, which could be stably used for a long time. Specification: Item Type: Current Voltmeter Product Material: ABS Size: Approx. 54 x 30 x 21mm / 2.12 x 1.18 x 0.82in Product Parameters: Voltage Range: 14-100V Test range (v) : 14-99.9V Resolution (v) : 0.1V Resistance () >1M Current Range: 10A Test Range (v) : +/-0.0-9.9A Resolution (A) : 0.1A Display Mode: 0.28in LED Two Color (red and blue) Working Current: < 30mA Operating Voltage: DC 4-30V (wide voltage) Measurement Accuracy : 1%(+/-2 words) Measurement Rate: 500mS/ time Operating Temperature: -10 ~ +50 Working Humidity: 10 ~ 80% (no condensation) Working Pressure: 80 ~ 106kPa Sun Exposure: Not Direct Exposure PackageList: 1 x Current Voltmeter