This energy meter can measure electrical parameters such as energy, voltage, current and power, and display the readings in automatic loop. It is compact, easy to install and safe to use. Features :LCD Display with Backlight: It can be read easily at a glance in a dark environment and automatically turns off the backlight after 30 seconds without operation.Automatic four-data loop display: Energy consumption, voltage, current and power readings are automatically displayed on the screen, each remaining displayed for 6 seconds.Quality Material and High Accuracy: Delay case to ensure safety, SMT chip technology IC ensures accurate measurement, excellent conductivity, corrosion resistance and stable performance.Compact and user-friendly: 35mm rail for installation, and can be installed directly in the electrical box, only occupying the 2P position. Features :Matter : ABS model: DDSU1897 Display: Backlit LCD / LCD without backlight (optional) Wiring: upper points for input and lower points for output, or vice versa Current: Voltage 5(60)A/5(80)A: Power 220VAC/50Hz: 17000W assembly: Distribution box / DIN rail Display: LCD Operating Temperature: -20~55 Item size: 7.85 * 3.65 * 4.3cm / 3.09 * 1.43 * 1.69in Item Weight: 100g / 3.52oz Package weight: 135g / 4.76oz Pack size: 8 * 5 * 5cm / 3.14 * 1.96 * 1.96in Packing List:1 * Energy Meter 1 * User Manual