A professional clamp meter that can test AC/DC voltage, AC current, resistance, diode, and detect the break point, firewire recognition, zero line identification, clear LCD display with green backlit, an has 1999 maximum display value. Features: Wide Measurement Range: NCV non-contact detection with AC/DC voltage, AC current, resistance, diode, and buzzer measurement, zero line and firewire recognition, can measure a variety of electronic components to meet multi-functional needs. HD LCD Digital Display: 4 digits display the measured data on the screen clearly, with green backlight for auxiliary checking value in the darkness. Has data hold function to keep the current value. 500A High Current: 1.2-inch (30.6mm) maximum clamp opening to measure current without touching or interrupting the circuit, 500A AC current not only has high accuracy, but also suitable for various wires. Low Power Consumption & Auto Shutdown: the clamp meter just powered by 2pcs AAA batteries(NOT included), low power consumption; and it will automatic shut off after 15 minutes if there is no operation, power saving. Small Compact Design: durable ABS structure, smooth surface with streamline ergonomic design for easy and comfortable one hand operation. Specifications: Material: ABS Max. Display: 1999 Counts Safety Grade: 600V CAT III Range: Auto range Power Supply: 2 * 1.5V AAA battery (NOT included) Operation Temperature: 0~40,