California Proposition 65: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. Xtra Duty Cordless Circuit Tester for quick detection of DC Voltage on autos, trucks and motorcycles from 3-30V DC test range; Polarity; Audible beep and dual color LED indicates red for DC Power and green for Ground reverse polarity testing; Test circuits without the need for a connection to ground just probe the circuit and touch vehicle ground with free hand; Built-in 3.6V lithium battery/30hr minimum; Computer safe, audible buzzer, clear handle, pocket clip, hi-vis orange safety tip protector, length is 6"