Energy Meter Dimensions W x H x D: 71.7 x 71.7 x 65 mm Frequency: 45...65 Hz Operating temperature: -25...+55 °C Measurement accuracy: Class 1 @ EN 62053-21 Operating voltage: 40...460 VAC Assembly type: DIN-Rail / Panel Mount Display type: LCD Displays: 7-Digit Operating voltage type: 1-/2-/3-phase Output: 2 x RS485 Protection rating: IP50 (Front Panel) Accuracy, display: 1 % Character height: 7 mm Decimal places: 1