Features: Ideal- for use in homes, offices, factories, laboratories and workshops. Accurately measure voltage, current and frequency with the LED digital display meter. Suitable for electricians, engineers, students and anyone who needs- to measure electrical parameters accurately. With its clear display and easy-to-use interface-, the GV05 makes measuring voltage, current and frequency a breeze-. Made- of durable plastic, this meter is lightweight and easy to use, making it perfect for both professionals and DIY enthusiasts. Specifications: Material: Plastic Working Power Supply: AC165-275V(220VAC System), AC280-450V(380VAC System) Power Consumption: MAX-1W Working Temperature: -40 to 75 Mounting Size: Approx. 51x26mm/2.01x1.02in Size: Approx. 60x33x51mm/2.36x1.30x2.01in Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Generator Tester