Vgate PowerTest PT150 Electrical System Diagnostic Tool1. Extremely easy to use and highly reliable2. Built-in Flashlight enables you to work in the dark3. Easy to read AVOmeter allows you to read voltage, current and resistance at the fingertip PowerTest PT150 Features:Performs every type of service including power injection, measurement, ground testing, polarity checks,continuity testing and components activationWith a flip of the power switch, you have an instant hot/ground lead for powering up electrical components like cooling fans, relays, etc.Simultaneously uses the hot lead and the ground lead to activate components right in your handInstantly identifies positive, negative and open circuitsTests for bad ground contacts instantly, allowing you to follow and locate shorts fast without wasting fusesInstantly checks continuity of switches, relays and diodesCircuit breaker protectedAudio tone indicator allows for no-look menu scrolling once users are familiar with menu tone assignment20ft (extendable) cable provides excellent accessibility to test along the vehicle Vgate PowerTest PT150 Specifications: Display: TFT color display (160 x 128 dpi)Operating Temperature: 0 to 60C (32 to 140F)External Power: 12.0 or 24.0 V power provided via vehicle battery