Features High measurement accuracy, stable performance. Adopting high-strength fire retardant material, safe and reliable. Simply pass the wire of the measuring loop through the small round hole on the right side of the gauge to complete the measurement. Multifunctional digital display meter can simultaneously measure AC voltage and current, active power, apparent power and power factor. Compact size and sturdy structure, easy installation. No external AC transformer is required for current measurement within 99.9 A. Specification: Measuring voltage: AC80-300V, AC200-450V (optional). Measuring current: AC100A (additional transformer is required if it is greater than 100A) Power supply: no power supply is required. Measurement accuracy: 0.5% Overall dimensions: 54 x 80 x 64 mm / 2.1 x 3.1 x 2.5 inches. Installation: 35mm DIN rail installation Features: Adopting high-strength fire retardant material, safe and reliable. No external AC transformer is required for current measurement within 99.9 A. High measurement accuracy, stable performance. Compact size and sturdy structure, easy installation. Multifunctional digital display meter can simultaneously measure AC voltage and current, active power, apparent power and power factor. Simply pass the wire of the measuring loop through the small round hole on the right side of the gauge to complete the measurement. Package list: 1 x multifunctional measuring device. Package List