Feature: 1. HIGH ACCURACY CLAMP MOUTH: Digital clamp meter with 36mm large opening, easy measurement. Long press the right button, turn on the flashlight lighting, not fear of dark environment 2. NCV NON CONTACT VOLTAGE SENSING: Press and hold SEL or NCV for more than 2 seconds to enter the NCV mode. When the nearby AC voltage is detected, an alarm will be generated, and the larger the voltage, the faster the beep 3. 600A HIGH CURRENT: Press the trigger of the clamp head and pass the single strand wire through the clamp head of the clamp meter to measure the current, measure the starting current and peak hold 4. DUAL IMPEDANCE VOLTAGE DETECTION: Clamp multimeter can avoid the possibility of stray, voltage or false voltage in the measurement circuit resulting in measurement errors 5. 15 MINUTES AUTOMATIC SHUTDOWN: When the amp voltage tester stop use for 15 minutes, the meter will automatically shut down. 1 minute before the shutdown, the built in buzzer will emit five sounds Specification: Item Type: Digital Clamp Meter Material: ABS Battery: 2 x 1.5V AAA battery(not included). Package List: 1 x Digital Clamp Meter2 x Pen Line1 x Temperature Line1 x Lanyard1 x Storage Bag1 x User Manual