Features: Concise appearance: Compact size, easy to carry and does not occupy space, portable pen type makes it easy to carry and say goodbye to the traditional heavy and difficult to carry. Large LCD display: Large LCD color display, red and green backlit alarm, larger font perfect for middle-aged and elderly electricians, easy to use. Intelligent identification: Power-on measurement, automatic identification of measurement signals, no need to switch gears, simple and convenient to use. Turn on direct measurement of AC voltage and DC voltage, resistance, circuit power on and off, with more accurate and precise measurement to meet various measurement needs Multifunctional function: Support zero line and live fire line judgment, line breakpoint detection, it can measure AC voltage and DC voltage, resistance, on/off, frequency, diode, NCV induction test, live zero line and fire line judgment. And automatic shutdown after 15 minutes of inactivity. Triple alarm: Sound and light alarm, with more accurate and precise measurement to meet various measurement needs. LED flashlight: With flashlight for easy lighting and use when measuring in dark environments. Lithium battery: Built-in 400mAh lithium battery, Type-C cable charging, longer life, use without fear. Wide application: It can be widely used in electrical testing, auto repair and other home improvement, industrial electrical maintenance, etc. Specifications: Name: Test Pen Multimeter Material: Plastic Type: with storage bag, without storage bag (optional) Display: LCD display with red and green backlight Battery: 1 * 3.7V, 400mAh lithium battery (included) DC voltage: 0-520V (DC mode), 0.5-520V (auto mode), 0.001V, (0.8% +3) AC voltage: 0-520V (AC mode), 0.5-520V (auto mode), 0.001V, (1.2% + 5) Resistance: 0-19.99, 1, (1.2% + 5) Capacitance: 1nF-1999F, 0.01nF, (3.5% + 8) Buzzer on/off: When the measured resistance <50, the buzzer will sound Non-contact voltage detection alarm: Support Firewire discrimination: Yes Automatic shutdown: About 15 minutes Flashlight: Yes Diode measurement: Automatic recognition of diode less than 3V Item size: 145 * 44 * 25mm / 5.71 * 1.73 * 0.98in Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.