Features No Need to Change Gears: Intelligently identify each gear, automatically switch gears, and work more efficiently. Intelligent Anti Burning Design: The non shifting design makes the chance of misuse to cause the watch to burn out. Unique Appearance Design: Exquisite craftsmanship, with temperature probe and meter pen, easy to operate and convenient to use. Functions: AC and DC voltage, AC and DC current, OHM, capacitance, frequency, temperature, on off buzzer, NCV, zero live wire discrimination, data retention. High Accurate Measurement: 4000 words display digital multimeter; millimeter level accuracy, multiple quick measurement functions. Spec: Item Type: Digital Multimeter Model: ZT-S4 Material: ABS + Rubber Battery: 2 x 1.5V AAA Battery(Not Included) Purpose: AC and DC voltage, AC and DC current, OHM, capacitance, frequency, temperature, on-off buzzer, NCV, zero live wire discrimination, data retention. Basic Parameters: DC Voltage (V): 4V/40V/400V/600V AC Voltage (V): 4V/40V/400V/600V AC (mA): 999.9mA AC (A): 9.999A DC (mA): 999.9mA DC (A): 9.999A OHM: 4kΩ/40kΩ/400kΩ/4MΩ/40MΩ Capacitance: 4nF/40nF/400nF/4μF/40μF/400μF/4mF How to Use: Press and hold this key for more than two seconds to turn on/off the product. If no functionswitching or knob operating is performed within 15 minutes after the product is turned on, the product will automatically shut down. One minute before the automatic shutdown, the product's built in buzzer will sound five times to remind you. If you want to cancel the automatic shutdown function, you should press and hold the power button and the voice button at the same time and then turn on the phone. If the cancellation is successful, the built in buzzer will beep five times. Packing list: 1 x Digital Multimeter 2 x Test Lead 1 x Temperature Probe 1 x Manual Notice: 1. Enter voltage measurement, short press this key to switch between AC and DC voltage. At this time, in AC voltage measurement mode, the secondary display will display frequency; in DC voltage measurement mode, the secondary display will display room temperature. 2. Touch the correct test point on the circuit with the test lead probe. 3. Read the voltage value displayed on the display. Package List 1 x Digital Multimeter 2 x Test Lead 1 x Temperature Probe 1 x Manual