Motorcycle Dual USB Charger SAE to USB Cable Adapter Voltmeter for CellPhone GPS

LED VOLTAGE DISPLAY: The SAE adapter has a built-in voltmeter. Monitories the battery and electrical system automatically and indicating the voltage in the screen, you will know the health of battery while driving. Please pay attention when the voltage is under 12V. The upgrade display, with soft LED blue light without glare, would not interfere with your sight. It is also a very convenient way to tell you if the connection is successful. WIDE COMPATIBILITY: The SAE to USB adapter is designed for use on any 12-24 volt battery, and is used to charge any iPhone, GPS, Camera, digital cameras, or any Smartphone or device that may be charged via USB. POWERFUL CAPACITY: The motorcycle power outlet comes with dual USB plugs, output 5V/2.1A & 5V/2.1A. This motorcycle phone charger lets you charge any two smartphones or tablet devices simultaneously, at top speed. OVER-CHARGE PROTECTION: CE certified, display the current detected by the intelligent circuitry while charging. Intelligent