Function: 1. Efficiency: The voltmeter adopts automatic decimal dot offset design, with strong anti-interference ability and fast display refresh rate. 2. This sam screen: the ma has a small size, supports simultaneously, the same voltage and current of the display. 3. Superior performance: Excellent SMT process and clear digital display for a superior viewing experience. 4. Application: The voltmeter can be used do monitor the battery, DC adjustable power supplies or other state of change in voltage and current of equipment. 5. Durable construction: The high-strength ABS construction ensures maximum durability, high performance, and stable performance. Specification: Item Type: Digital Ammeter Voltmeter Material: ABS Technical parameters: Test voltage range: 600 V, test range (v): 0-600 V, resolution (v): 1 V, resistance (Ω) > 2 M Test current range: 100A range, test range (A): 0.0-99.9A, resolution (A): 0.1A Product Size: Approx.: 70x40x30mm/2.75x1.57x1.18in Installation hole: approx.: 68x38mm/2.67x1.49in Measurement accuracy: 1% (1 bit) Measurement speed: 500mS/ time Working environment: Operating temperature: -10- 65 Operating humidity: 10 - 80% (non-condensing) Operating pressure: 80 -106kPa Operating current: Supply voltage: DC 3,5 – 30 V Sun exposure: Not direct exposure Display Mode: All three digits 2x0,39 inch LED List of packages: 1 x Digital Ammeter Voltmeter