Feature: 1. AUTOMATIC IDENTIFICATION AND MEASUREMENT: After turning on, the multimeter can measure AC and DC voltage, resistance, on off, and automatically identify gear changes. 2. AC VOLTAGE MEASUREMENT: Red and black test pens touch neutral and live wires respectively, and the screen automatically displays the AC voltage value. 3. DC VOLTAGE MEASUREMENT: Red and black test pens touch the positive and negative poles of the battery respectively, and the screen automatically displays the DC voltage value. 4. RESISTANCE MEASUREMENT: Red and black test pens touch both ends of the resistance, and the screen automatically displays the resistance value. 5. ON OFF TEST: When the test pen contacts both ends of the tested route, the channel will emit an alarm sound. If there is an open circuit, there will be no response. Specification: Item Type: Auto Multimeter Mode: TA806A Material: ABS AC Voltage: 0.8V-600V/± (1.2% reading+5 words) DC Voltage: 0.8V-600V/± (1.0% reading+5 words) Resistance: 1 Ω-40MΩ/± (1.2% reading+5 words) On Off Test: 1 Ω-50 Ω Display Digit: 4 digit display, maximum 4000 Sampling Rate: 3 times/second Over Range Display: The highest display is "OL" Automatic Shutdown: 15 minutes (can be manually turned off) Operating Environment: -10 to 50 ℃, maximum relative humidity of 80%; Indoor altitude less than Approx. 2000m / 6561.7ft Storage Environment: -10 to 50 ℃, maximum 70% relative humidity (with battery removed) Battery: 1.5V AAA battery x 2 (without battery). Package List: 1 x Auto Multimeter2 x Test Pen 1 x Manual