Features: LED digit display type with blue LCD backlight color. High accuracy and easy to install. Working power supply of AC or DC 9V-12V. The Shunt is used to multiply the measuring range of current. Strong anti-jamming capability Appearance with standard size. Could be used either in a Digital or an Analog meter. Specifications: backlight color: Blue Digital display type: LED Working power supply: AC or DC 8V-12V Measuring range : DC 100A Accuracy : 0.5% Shunt current: 100A Shunt voltage drop: 75mV Ampere size : 81 x 43 x 24mm / 3.2 x 1.7 x 1in Ampere weight: 40g / 1.41oz Shunt size: 10.8 x 2.3 x 1cm / 4 x 0.9 x 0.4in Shunt weight: 144g / 5.07oz Package weight: 192g / 6.77oz Package size: 10.8 x 4.5 x 5.5cm / 4 x 1.8 x 2.2in Package List: 1 x DC 100A Digital Display Ammeter 1 x 100A/75mV Shunt Resistor