1. The D52-2058 rail-type digital display multi-function meter simultaneously displays the measured AC voltage, AC current, power factor, active power, frequency, and electrical energy (electricity) on the meter. 2. Please check AC80-300V for measuring 110V 220V voltage, and 200-450V for measuring 380V voltage 3. Measurement accuracy: 1% +/- 2 words 4. Display: 4-digit red 0.31-inch LED digital tube for voltage display, 5-digit red 0.31-inch LED digital tube for current and frequency display, 5-digit green 0.31-inch LED display for active power and electrical energy (electricity) Digital Tube 5. Measurement range: AC voltage: AC80. 0-300. 0V, AC200. 0-450. 0V, AC current: AC0-100. 0A, the current display resolution is 0. 01A when the measurement current is less than 100A, and the measurement current is greater than 0.01A At 100A, the current display resolution is 0.1A, and the range is automatically converted. 6. Active power: (measurement voltage AC80. 0-300. 0V) 0.0-30000W (AC200. 0-450. 0V: 45000W) 7. Electric energy: 0. 000-99999kwh, decimal point automatic conversion 8. Power frequency: 45. 00-65. 00HZ 9. Power factor: 1.000-0. 000 10. Measurement speed: about 2 times per second 11. Weight: 145g 12. Installation width: the instrument occupies the 3P air switch position (DZ47/C45) 14. Installation method: track type