Product Features Model: ANENG ST181 High Precision: 4000 counts digital clamp meter for accurate measurements. Multi-Function: Measures AC/DC voltage, AC current, resistance, frequency, and capacitance. Continuity Testing: Built-in buzzer for continuity check and circuit testing. Manual Range Selection: Allows manual selection of measurement function and range for better control. Full-Range Overload Protection: Safety ensured across all measuring ranges. Backlit LCD Display: Large display with backlight for easy reading in dim environments. Data Hold Function: Retain readings on the display for convenience. Low Battery Indicator: Alerts when battery is low for timely replacement. Auto Power Off: Saves battery life by automatically shutting down when not in use. Wide Application: Ideal for testing and maintenance of various electrical equipment. Measurement Ranges DC Voltage: 4V / 40V / 400V / 600V ±(1.5% 3) AC Voltage: 400mV / 4V / 40V / 400V / 600V ±(1.0% 3) Resistance: 400 / 4k / 40k / 400k / 4MΩ ±(1.2% 3), 40MΩ ±(1.5% 5) AC Current: 40A / 400A ±(2.5% 3) Frequency: 10Hz ~ 400kHz ±(1.0% 5), 400kHz ~ 4MHz ±(2.0% 5) Capacitance: 1nF ~ 4uF ±(2.5% 10), 4uF ~ 400uF ±(4.0% 20), 4mF ±(5.0% 30) Working Conditions Operating Temperature: 18°C to 28°C Package Includes 1 × ANENG ST181 Clamp Meter 1 × Black Packing Bag 2 × Test Probes 1 × User Manual