1、SMART SWITCHING: With AL smart automatic mode, the 4000 count smart multimeter allow you to quickly switch between all measurement tasks, including AC DC voltage, resistance, and continuity, without having to choose a mode or range. Make the measurement work easy, fast and accurate 2、NON CONTACT MEASUREMENT: Completely safe non contact voltage test, multimeter with visual and auditory alarm, save time and safe. You can measure voltage on AC wires without connecting wires, making line troubleshooting easier 3、SAFETY PROTECTION: Meet Class II 600V, CE and RoHS certification. The multimeter adopts overload protection measures to improve product safety and maximize user safety. The external silicone cover protect the multimeter from damage and potential electric shock 4、MULTIPLE FUNCTIONS: Multimeter supports data hold, automatic shutdown, low power indicator, backlight display, flashlight. All of these convenience features make the instrument adequate for everyday use by hobbyists, car owners and homeowners. Easy to use and enjoy endless DIY fun 5、SWITCHABLE BATTERY: Digital multimeter tester with separate LED lights for easy work in the dark. The dashboard can be replaced with a battery, unscrew the bottom screw, and then slide the shell down and replace with fresh electricity