1. Fully automatic identification and measurement: After starting the machine, it can measure AC/DC voltage, resistance, on/off, and automatically identify gear changes 2. AC voltage measurement: The red/black probe contacts the zero/live wire respectively, and the screen automatically displays the AC voltage value 3. DC voltage measurement: The red/black probe contacts the positive and negative poles of the battery respectively, and the screen automatically displays the DC voltage value. 4. Resistance measurement: The red/black probes touch both ends of the resistance, and the screen automatically displays the resistance value. 5. On/off test: When the probe contacts both ends of the tested route, the channel will emit an alarm sound, and if there is an open circuit, there will be no response. Model: TA806A AC voltage: 0.8V-600V/± (1.2%+5) DC voltage: 0.8V-600V/± (1.0%+5) Resistance: 1 Ω-40M Ω/± (1.2%+5) On/off test: 1 Ω-50 Ω NCV induction: √ Display digit: Four 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) Usage environment: -10-50 ℃, maximum relative humidity of 80%, indoor altitude Less than 2000m Storage environment: -10-50 ℃, maximum 70% relative humidity (with battery removed) Product size: 117X58X26mm Display screen size: 33X25MM Weight: 75g Power supply: 2 * 1.5V AAA No. 7 battery (shipped without battery) Color: Black Material: plastic Package Contents: 1 * Multimeter 1 * pen line Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.