This energy meter can measure electrical parameters such as energy, voltage, current and power, and display the readings in automatic loop. Il est compact et facile installer, sr utiliser. LCD display with backlight: It can easily read in a glance in a dark environment and automatically turn off the backlight after 30 seconds without operation.&lt; strong&gt;Four data automatic loop display: power consumption, voltage, current and power readings will be automatically switched on the screen, each remaining for 6 seconds.Material Quality and High Accuracy: Fireproof housing to ensure safety, SMT chip technology IC provides accurate measurement, excellent conductivity, corrosion resistance and stable performance. Compact and user-friendly: 35mm rail for installation, and can be directly installed in the electrical box, only occupying the 2P position. Specifications:Material: ABS< br/>Model: DDSU1897 Display: Backlit LCD / Non-backlit LCD (optional)Wiring: Upper points for input and lower points for output, or vice versa Current: 5(60)A/5(80)AVoltage: 220VAC/50HzPower: 17000WMounting: Distribution box / DIN railDisplay: LCDOperating temperature: -20~55 Item size: 7.85 * 3.65 * 4.3cm / 3.09 * 1.43 * 1.69inItem weight: 100g / 3 .52ozPackage weight: 135g / 4.76ozPackage size: 8 * 5 * 5cm / 3.14 * 1.96 * 1.96inPacking List:1 * Energy Meter&lt; br /&gt;1 * User Manual