Brand Stanley Power Source Battery Powered Style Digital Tester-Black Colour Yellow and Black Item Weight 120 Grams About this item 12V-220V AC/DC live object through LCD display.When testing, please touch the earth with your hand Breakpoint testfind phase line/ground line or break point & place the tip of the tester If the tester voltage doesn't reach 70% of higher voltage then it will display lower voltage. Induction voltage testing, you can use induction electrode to tst electric object lower than 12V You can check if the electric current is flowing by placing the tester on top of the wire Limited Life time warranty offered on the product The product is manufactured by Stanley Black & Decker with registered trademarks