Descriptions: This electrical parameter meter is adopted of OLED digital display screen, which is clearer and more intuitive. 7-1 multi-function measurement parameters, suitable for engineering monitoring power/DIY charging meter/car/battery, etc. Features: Adopted of OLED digital display screen,which is clearer and more intuitive. 7-1 multi-function measurement parameters, main measurement parameters: running time, temperature, current, voltage, power, capacity, energy. Sensitive reaction, and a variety of color fonts are optional: blue, white. Compact and lightweight, easy for installation and carrying With wide application, suitable for engineering monitoring power/DIY charging meter/car/battery, etc. Specifications: Input voltage: 4-20V Type(Optional ): 33V/3A blue, 33V/3A white, 33V/10A white, 100V/10A white Main measurement parameters: run time, temperature, current, voltage, power, capacity, energy. Size: Approx. 4.8 x 3 x 2cm/1.89 x 1.18 x 0.79inch Weight:31g Model 33V3A 33V10A 100V10A Voltage measurement range DC00.00-33.00V DC00.00-33.00V DC00.0-99.9V Current measurement range 0.000-3.000A 0.00-9.99A 0.00-9.99A Power measurement range 00.00-99.00W 00.00-99.99W -330.0W 00.00-99.99W -999.9W Energy measurement range 0-999.99Wh 0-3300.0Wh 0-9999.9Wh Voltage measurement accuracy (0.3% +2digits) （0.3% +2digits) ±(0.5% +1digit) Current measurement accuracy ±(0.8% +3digits) ±(1% +2digits) ±(1% +2digits) Capacity measurement range 00.00-99.999Ah Time measurement range: 0-99h59min Temperature measurement range): -15~60℃ Package Included: 1 x Electrical Parameter Meter 1 x Instructions Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering .