Usage Tips:Comprehensive Measurement Range: This versatile 3 in 1 meter accurately measures voltage (AC 60-500V), current (0-100A), and frequency (20-75Hz) with a precision class of ±5%. It operates effectively within a temperature range of -20 to +60°C, ensuring reliability in various environments. Clear and Bright Display: Equipped with a large square LED 3-digit display, this voltmeter ammeter provides instant, clear readings of electrical parameters. The vibrant red LED display ensures visibility even in low-light conditions, making it ideal for monitoring electrical systems. Durable and User-Friendly Design: The robust lampshade of the indicator light offers excellent impact resistance, enhancing the durability of the meter. Installation is straightforward-simply thread the load cable through the included current former to start measuring electrical flow. Versatile Applications: Ideal for a wide range of industrial and commercial applications, this digital meter can be used for signal indication in sectors such as electric power, telecommunications, machine tools, shipping, textile, printing, and mining machinery. Real-Time Monitoring: Stay informed with real-time updates on electrical parameters. This digital voltmeter and ammeter is designed for continuous monitoring, providing peace of mind and aiding in preventive maintenance of your electrical systems. Colour:As Shown Material:plastic Package Contents: 3 * voltage measuring inst ent Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.