Product function:1. Real time voltage detection, record peak voltage.2. Real time current detection, record peak current3. Real time power detection, record peak power4. Low power drain5. Reverse polarity drainProduct parameter:1. Voltage detection range: 4.5-30V2. Current detection range: 0-30A3. Display updated rate: 0.5SSize = 48mm x 24mm x 10mmColour: BlackPackage Contents:1 * GT Power Mini Watt Meter