UNI-T UT18D Auto Range Voltage and Continuity Tester with LCD Backlight Data Hold RCD Test and Self-inspection The product is shipped based on the color or size of the main image of the product page. UT18D can provide AC and DC voltage (including the three-phase alternating current) measurement, phase of three-phase AC power indicator, on-off test, RCD Test, single pen measurement (can determine the zero line or wire), self checking and other functions. Suitable for: smelting, electronics, manufacturing, defense, electric power, petroleum, chemical industry. More detailed product information, please refer to the English manual. Features: With test pen cap to protect the test and ensures safe using. LCD display voltage and frequency. DC & AC voltage measurement is up to 690V. Indicate the phase relationships among three-phase AC. Judge the zero or live wire by single test pen measurement. Buzzing or mute mode switchable. Low battery indicator and over load indication of voltage measuring. Other functions of Continuity Measurement, Illuminating, Self-inspection, RCD Test, Polarity Detection, LCD Backlight, Auto Range, Data Hold, and Automatic Standby. Suitable for smelting, electronics, manufacturing, defense, electric power, petroleum, chemical industry. Specifications: Material: PP Color: Red and grey Over Voltage Protection Class: CAT III 690V, CAT IV 600V AC/DC Voltage Range: 12/24/50/120/230/400/690V Phase Rotation Test Operating Voltage: 100V~690V, frequency: 50Hz~ 60Hz Single Lead (L2) Voltage Detection Operating Voltage: 100V~690V, frequency: 50Hz~ 400Hz Continuity Test: 0~100K RCD Test Operating Voltage: 230V(50~400Hz) Power Supply: 2 * 1.5V AAA battery (NOT included) Working Temperature: -15~45 Storage Temperature: -20~60 Working Humidity: 85%RH LCD Size: 70 * 35mm / 2.76 * 1.38in Item Size: 272 * 85 * 31mm / 10.71 * 3.35 * 1.22in Item Weight: 281g / 9.93oz Package Weight: 422g / 14.89oz Package Size: 35.4 * 17.4 * 4.8cm / 13.94 * 6.85 * 1.89in Packing List: 1 * Voltage and Continuity Tester 1 * Manual (English)