4. Resistance measurement: The red/black probes touch both ends of the resistance, and the screen automatically displays the resistance value. 1. Fully automatic identification and measurement: After starting the machine, it can measure voltage, resistance, on/off, and automatically identify gear changes 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. 2. AC voltage measurement: The red/black probe contacts the zero/live wire respectively, and the screen automatically displays the AC voltage value 5. On/off test: When the probe contacts both ends of the tested route, the channel emit an alarm sound, and if there is an open circuit, there be no response., Weight: 0.38360433588 Pounds, Manufacturer: Ehwisbe