Unique Advanced Digital Multimeter with LED Backlit Display and Built in Flashlight The most practical digital multimeter on the market. No need for a flashlight to see the digital display and lighting up the work area Unit has voltage ,current ,resistance , diode and transistor testers built in Great for automotive or home use even in total darkness Unit has two internal sets of batteries, 9 volt for multimeter and 2 AA batteries for flashlight and backlight