?Car Charger Dual 2 USB Voltage Current Meter Tester Adapter Description:Dual 3.1A USB OutputEasy to satisfy your need with Dual USB socket.Fixed bracket helps stabilize the Car USB charger.Multifunctional product with 10A protective tube｣ｬ perfect for travel use.Apply to all USB charging mobile phones or other electronic products.This easily installed 5V｣ｬ 2.1A output port keeps your smart phone｣ｬ GPS｣ｬ MP3.Optimised for iPad｣ｬ iPhone & iPod - fast charging at full speed (2.1Amps for iPad｣ｬ 1Amp for iPhone\/iPod). Item specifics:Color:Black｣ｬWhiteInput Voltage:DC 12-24VOutput Voltage:DC 5VOutout Current: 3.1AVoltage Measuring Range: 5-25VCurrent Measuring Range: 0-3.1ATemperature Measuring Range:-20\u2103-80\u2103 Package Included:1x 4 in 1 Car Charger Dual 3.1A USB Voltage Current Meter Tester Adapter More detail: