Features Reliable Performance: The digital panel has good product stability and high measurement accuracy. Easy to Install: The exterior size is standard and easy to install. Polarity Protection Line: The digital panel uses polarity protection line for Power supply. Easy to Carry: Mini size, digital panel is portable and convenient. High Quality: The digital panel is high quality and durable for long term use. Specifications: Technical Parameters: Supply voltage: DC4.5~30V Ammeter range: 10A (with overcurrent protection) Working current: <30mA Weight: 17.5g/0.62oz Display mode: 3 digits 0.56' Size: Approx. 48*22*29mm/1.89*0.87*1.14in (length X width X height) Mounting bore: 45.5*25.5 mm/1.79*1 in Measuring rate: >200Ms Measurement accuracy: 1% Extreme working conditions: Low operating voltage: 4.5V Maximum operating voltage: +30V Maximum current output: 9.99A Operating temperature: 1~+65°C) Working humidity: 10~80% (no condensation) Working pressure: 80-106kPa Sun exposure: no direct irradiation Color: Red,Yellow, Green, Blue, Optional Package List: 1 * Digital DC current Ammeter 2 * Cable Package List