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_x000D_ Product Material: ABS _x000D_ Size: Approx. 54 x 30 x 21mm / 2.12 x 1.18 x 0.82in_x000D_ Product Parameters: _x000D_ Voltage Range: 14-100V Test range (v) : 14-99.9V Resolution (v) : 0.1V Resistance () >1M _x000D_ Current Range: 10A Test Range (v) : +/-0.0-9.9A Resolution (A) : 0.1A _x000D_ Display Mode: 0.28in LED Two Color (red and blue) _x000D_ Working Current: < 30mA _x000D_ Operating Voltage: DC 4-30V (wide voltage) _x000D_ Measurement Accuracy : 1%(+/-2 words) _x000D_ Measurement Rate: 500mS/ time _x000D_ Operating Temperature: -10 ~ +50 _x000D_ Working Humidity: 10 ~ 80% (no condensation) _x000D_ Working Pressure: 80 ~ 106kPa _x000D_ Sun Exposure: Not Direct Exposure PackageList: 1 x Current Voltmeter