describe: High Accuracy - The power voltmeter measures 85.3 x 44 x 32 mm/3.4 x 1.7 x 1.3 inches and has a built-in shunt design for more accurate measurements. HIGH QUALITY MATERIAL - The ammeter is made of improved PBT material, which is high temperature resistant, very durable and has a long service life. LCD digital display - green backlight for power meter readings, measuring current range 0-300A, HTN wide viewing angle, clear view of the LCD screen, easy to read. Multimeter - A voltmeter for a power supply can display voltage, current, power, energy consumption, current reversal indicator, and energy consumption reversal indicator. Easy to install - embedded installation, minimal wiring, can be used in high and low voltage distribution cabinets, electronic DIY, etc., suitable for indoor use. Package contents: 1 piece shunt (300A meter + line)