Features Bright and Clear LED Display: Features a mini digital blue LED voltage tester with automatic movement, providing a bright and clear display for convenient viewing of measurement results. No External Power Supply Required: Operates without the need for an external power supply, allowing the measured voltage to be used directly as the power supply, ensuring hassle-free usage. Convenient 2-Wire Design: Designed with a 2-wire configuration for convenient wiring, along with reverse connection protection, offering a measurement range of AC 70V‑500V for added convenience. Easy Installation and Use: The red wire connects to the positive pole, and the black wire to the negative pole, ensuring simple installation and use. The meter provides good stability, high measurement accuracy, and easy reading. High Measurement Accuracy: Boasts high stability and measurement accuracy, making it a reliable tool for accurate voltage and current measurements. Specification: Item Type: AC Voltage and Current Digital Display Meter Material: ABS Model: AT-5035-A/V Voltage Measurement Range: 50-500V Current Measurement Range: 1-80A Display: LED Digital Tube Working Environment: -20℃~40℃, Humidity ≤80% Purpose: Measure Voltage and Current Package List: 1 x Header 1 x Wiring 1 x Wire with Magnet Package List 1 x Header 1 x Wiring 1 x Wire with Magnet