Features: 1. Good product stability, high measurement accuracy and strong anti-interference ability. 2. The appearance is standard size and easy to install. 3. The power supply uses polarity protection lines. 4. LED digital display, the reading is more convenient. 5. It is the perfect instrument for testing current. Specifications: Condition:100% Brand New Material: Plastic Color: Blue 100A full scale: plus or minus 100.00, resolution, 0.01A Working voltage: +5V5% Working current: 1M Measurement rate: 2 / S Decimal point position selectable Can be calibrated by potentiometer SMT process Overrange display: display "H" Extreme working conditions: Working voltage: +5V5% Working temperature: -10 ~ +50 C Working humidity: 10~80% (no condensation) Working pressure: 80 ~ 106kPa Sunlight: No direct illumination Package List: 1*Host 1*Test Cable Note: This header does not include a shunt. If you need to add the range of the shunt, please take another shunt. For customers with shunts, please note your shunt specifications (75mV as standard). This meter adopts the common ground design, that is, the "IN-" of the test end is connected to the "negative pole" of the power supply end, so the ammeter can only be stringed between the load negative and the negative power supply. It is recommended to use separate power supply. Four and a half, that is, the last four digits are all numbers, 0~9, the first digit can only be 1 or -1, so and so on, such as 20A: 19.999, 50A: 50.00, 100A: 100.00, 200A: 199.99...... ...... Tables above 10A must be added with a shunt to work. If you buy 20A, or 50A/100A, even if you test 0.1A, you must add a shunt to work.