Features:  [3-in-1 Multifunction Multimeter] Digital multimeter, electrical test pen and flashlight. 2 measuring pens are easy to install and use. Widely used in electrical testing, automotive repairing, and more household/ industrial electrical problems.  [Auto Recognition/ Manual Selection] High accuracy, wide measuring range, 4000 counts, auto recognition or manual selection. It can test AC voltage, DC voltage, resistance, frequency and continuity. And HT125B can also test capacitance and diode.  [Electrical Test Pen] Bring the NVC part close to the conductor or use the red measuring pen (remove the black measuring pen) to contact the conductor, and it will send out an audible and visual alarm when the AC voltage is detected. It can help you recognize zero wire and live wire safely and easily.  [Backlight LCD Screen & Flashlight] Clear LCD screen with backlight greatly enhances the reading experience and makes it easy to read. Flashlight to illuminate the measurement object without fear of dark environment.  [Battery Operated & Compact Size] Powered by 2 AAA batteries, auto shutdown in about 15min to save power. Ergonomic design, perfectly fits your palm for convenient use. Concise appearance, compact and lightweight, easy to carry.    Note:  1. Please read the user manual carefully before use.  2. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding.    Specifications:  Model: HT125A/ HT125B (Optional)  --HT125A: without Capacitance Measurement/ Diode Test  --HT125B: with Capacitance Measurement/ Diode Test  Color: Black  Material: ABS  Screen: LCD with Backlight  Max. Count: 4000 Counts  Max. Voltage: 600V DC or AC  Max. Resistance: 40MΩ  Continuity: ＜Approx. 50Ω, buzzer will sound and the indicator light will be on  Max. Frequency: 4MHz  Max. Capacitance: 4mF (HT125B only)  Display Diode Voltage Drop: (HT125B only)  Power Supply: 2 * 1.5V AAA Battery (NOT included)  Auto Shutdown: about 15min  Operating Height: ＜2000m  Operating Environment: 0~40℃ (＜80% RH, ＜10℃ non condensing)  Storage Environment: -10~60℃ (＜70% RH, remove the battery)  Item Size: 125 * 65 * 20mm / 4.92 * 2.56 * 0.79in  Item Weight: 106g / 3.75oz  Package Size: 16.5 * 9.5 * 5cm / 6.50 * 3.74 * 1.97in  Package Weight: 234g / 8.26oz    Package List:  1 * Smart Digital Multimeter  2 * Measuring Pen  1 * User Manual (English)